Do I need to install anything to use OneSource MCP?

Yes. OneSource MCP runs as a local process, so the package has to be installed on the machine where the client runs.

How do I install OneSource MCP?

Install the npm package @one-source/mcp and run it with npx -y @one-source/mcp.

Does OneSource MCP need an API key?

Yes. It reads 2 environment variables from the environment, so you need to supply X402_PRIVATE_KEY, ONESOURCE_API_KEY before the server will start.

What is X402_PRIVATE_KEY used for in OneSource MCP?

EVM private key (64-char hex, 0x prefix optional) for automatic x402 USDC payments on Base.

What is ONESOURCE_API_KEY used for in OneSource MCP?

OneSource API key for Bearer token auth.

Which transport does OneSource MCP use?

Stdio. Your client has to support that transport to connect.

Where is the source code for OneSource MCP?

The publisher lists https://github.com/blockparty-global/1s-mcp as the source repository.

Is OneSource MCP an official server?

It is published under the namespace io.onesource, which means the publisher proved control of that domain when registering. That confirms who published it, not that it has been reviewed for quality or security.

Which version of OneSource MCP is listed here?

Version 5.12.0, taken from the latest registry entry.

OneSource MCP MCP server

Name: OneSource MCP
Author: onesource

46 tools for blockchain data, Deepstate market data, live chain queries, and REST API documentation.

Install this server Official setup page View source

66/100?Number 139 of 1,134 in Finance and Market Data

verified publishersource repositorytool list publishedupdated recentlyactive entry

How this score is calculated

Local VERIFIED Finance and Market Data

Details

Registry name: io.onesource/mcp
Publisher: onesource
Version: 5.12.0
Distribution: Local. the server runs as a process on your own machine and talks to the client over stdio. You install the package first, and your data stays on your machine.
Transports: stdio
Source repository: blockparty-global/1s-mcp
Website: https://mcp.onesource.io
First published: 2026-09-07
Registry updated: 2026-09-07
Credentials required: 2 environment variables
Schema generation: 2025-12-11

Packages

npm @one-source/mcp

Version: 5.12.0
Transport: stdio
Runtime: not specified

Environment variables
Variable	Required	Secret	Purpose
X402_PRIVATE_KEY	Yes	Yes	EVM private key (64-char hex, 0x prefix optional) for automatic x402 USDC payments on Base
ONESOURCE_API_KEY	Yes	Yes	OneSource API key for Bearer token auth

Install OneSource MCP

Pick your client. The configuration below is generated from this server's published package and endpoint data.

Claude Code command line

Configuration file: .mcp.json or ~/.claude.json

Local package (npm)

claude mcp add mcp-onesource --env X402_PRIVATE_KEY=<x402_private_key> --env ONESOURCE_API_KEY=<onesource_api_key> -- npx -y @one-source/mcp

Replace each placeholder with your own value before saving.

Check it worked: Run claude mcp list and check the server reports connected.

Official Claude Code MCP documentation

Cursor IDE

Configuration file: .cursor/mcp.json or ~/.cursor/mcp.json

Local package (npm)

{
  "mcpServers": {
    "mcp-onesource": {
      "command": "npx",
      "args": ["-y", "@one-source/mcp"],
      "env": {
        "X402_PRIVATE_KEY": "<x402_private_key>",
        "ONESOURCE_API_KEY": "<onesource_api_key>"
      }
    }
  }
}

Replace each placeholder with your own value before saving.

Check it worked: The server appears under Settings, then MCP with a green dot.

Official Cursor MCP documentation

Claude Desktop desktop app

Configuration file: ~/Library/Application Support/Claude/claude_desktop_config.json or %APPDATA%\Claude\claude_desktop_config.json

Local package (npm)

{
  "mcpServers": {
    "mcp-onesource": {
      "command": "npx",
      "args": ["-y", "@one-source/mcp"],
      "env": {
        "X402_PRIVATE_KEY": "<x402_private_key>",
        "ONESOURCE_API_KEY": "<onesource_api_key>"
      }
    }
  }
}

Replace each placeholder with your own value before saving.

Quit the app completely and reopen it.

Check it worked: Look for the tools icon in the message composer.

Official Claude Desktop MCP documentation

Visual Studio Code IDE

Configuration file: .vscode/mcp.json or user settings.json under mcp

Local package (npm)

{
  "servers": {
    "mcp-onesource": {
      "type": "stdio",
      "command": "npx",
      "args": ["-y", "@one-source/mcp"],
      "env": {
        "X402_PRIVATE_KEY": "<x402_private_key>",
        "ONESOURCE_API_KEY": "<onesource_api_key>"
      }
    }
  }
}

Replace each placeholder with your own value before saving.

Check it worked: Open the Copilot chat tools picker and confirm the server is listed.

Official Visual Studio Code MCP documentation

Codex CLI command line

Configuration file: ~/.codex/config.toml

Local package (npm)

codex mcp add mcp-onesource -- npx -y @one-source/mcp

Replace each placeholder with your own value before saving.

Check it worked: Run codex mcp list and check the server is present.

Official Codex CLI MCP documentation

More clients (9), including automation platforms

Cline IDE

Configuration file: cline_mcp_settings.json, reachable from the MCP Servers pane

Local package (npm)

{
  "mcpServers": {
    "mcp-onesource": {
      "command": "npx",
      "args": ["-y", "@one-source/mcp"],
      "env": {
        "X402_PRIVATE_KEY": "<x402_private_key>",
        "ONESOURCE_API_KEY": "<onesource_api_key>"
      }
    }
  }
}

Replace each placeholder with your own value before saving.

Check it worked: The server appears in the MCP Servers pane with its tool count.

Official Cline MCP documentation

Goose desktop app

Configuration file: ~/.config/goose/config.yaml

Local package (npm)

extensions:
  mcp-onesource:
    type: stdio
    cmd: npx
    args: ["-y", "@one-source/mcp"]
    enabled: true

Replace each placeholder with your own value before saving.

Check it worked: Run goose session and confirm the extension loads.

Official Goose MCP documentation

LangChain agent framework

Install the MCP adapter package and construct a client in code

Local package (npm)

client = MultiServerMCPClient({
    "mcp-onesource": {
        "command": "npx",
        "args": ["-y", "@one-source/mcp"],
        "transport": "stdio",
    }
})

Replace each placeholder with your own value before saving.

Check it worked: Print the loaded tool list before running the agent.

Official LangChain MCP documentation

Windsurf IDE

Configuration file: ~/.codeium/windsurf/mcp_config.json

Local package (npm)

{
  "mcpServers": {
    "mcp-onesource": {
      "command": "npx",
      "args": ["-y", "@one-source/mcp"],
      "env": {
        "X402_PRIVATE_KEY": "<x402_private_key>",
        "ONESOURCE_API_KEY": "<onesource_api_key>"
      }
    }
  }
}

Replace each placeholder with your own value before saving.

Check it worked: The server appears in the Cascade plugin list.

Official Windsurf MCP documentation

Zed IDE

Configuration file: ~/.config/zed/settings.json

Local package (npm)

{
  "context_servers": {
    "mcp-onesource": {
      "command": {
        "path": "npx",
        "args": ["-y", "@one-source/mcp"]
      }
    }
  }
}

Replace each placeholder with your own value before saving.

Check it worked: The agent panel lists the server under context servers.

Official Zed MCP documentation

Tools

43 tools, from the publisher's manifest. A parameter marked with an asterisk is required. By intent: 41 answer and 2 not classified.

Intent says what a tool does with the world. Answer reads and returns information and changes nothing. Act changes state somewhere, by writing, creating, sending or deleting. Transact moves money, buys something or commits to a cost. A value marked declared is the publisher's own annotation on their own tool. A value marked inferred is this catalogue reading the tool name and description, and is not a claim by the publisher. Where neither settles it, the tool is left unclassified rather than guessed at.

Tool	What it does	Intent	Parameters
1s_address_txs	Get transaction history for an address (sent and received). Sorted by block number descending. Use from_block/to_block to narrow the range.	answer inferred	limit, address, network, to_block, from_block
1s_block	Get indexed block details by block number. Returns block metadata including timestamp, transaction count, and gas used. For the latest pending block, use 1s_pending_block instead.	answer inferred	network, block_number
1s_contract_info	Get indexed contract metadata including deployment info and detected standards. Use this for enriched contract data; use 1s_contract_info_live for real-time ERC standard detection via RPC.	answer inferred	address, network
1s_erc1155_balance	Get indexed ERC1155 token balance. Use this for cached lookups; use 1s_erc1155_balance_live for real-time data. Requires the contract address and specific token ID.	answer inferred	account, network, contract, token_id
1s_erc20_balance	Get indexed ERC20 token balance for a wallet. Use this for historical or cached balance lookups; use 1s_erc20_balance_live for real-time data. Returns token metadata (name, symbol, decimals) alongside the balance.	answer inferred	token, account, network
1s_erc20_transfers	Get ERC20 transfer history filtered by token and/or wallet. Use this for indexed transfer records; use 1s_erc20_transfers_live for raw Transfer event logs. Sorted by block number descending.	answer inferred	limit, token, wallet, network
1s_events	Search indexed event logs by contract address and/or event name. Use this for decoded, searchable events; use 1s_events_live for raw eth_getLogs against the node. Sorted by block number descending.	answer inferred	limit, network, contract, to_block, event_name, from_block
1s_nft_media	Get processed media files (images, videos, thumbnails) for an NFT. Use this to get optimized media URLs with dimensions and content types. Only returns successfully processed media (status=OK).	answer inferred	network, contract, token_id
1s_nft_metadata	Get NFT metadata including name, description, image URL, and traits from the index. Use this for enriched metadata; use 1s_nft_metadata_live to fetch directly from the token's URI. Excludes records with fetch errors.	answer inferred	network, contract, token_id
1s_nft_owner	Get the current owner of an NFT from the index. Use this for quick ownership checks; use 1s_nft_owner_live for guaranteed real-time data. Filters out zero-balance holders automatically.	answer inferred	network, contract, token_id
1s_tx_details	Get indexed transaction details with decoded event logs. Use this for rich transaction data; use 1s_tx_details_live for unindexed or very recent transactions. Returns both the transaction and up to 100 associated events.	answer inferred	hash, network
1s_wallet_nfts	Get a wallet's complete NFT portfolio with metadata enrichment. Returns ERC721 and ERC1155 tokens with names, images, and collection info. Results sorted by most recently updated.	answer inferred	limit, account, network
1s_allowance_live	Check ERC20 token allowance (approved spending amount) via the allowance(owner,spender) RPC call. Use this before executing transferFrom or to verify approvals. Returns the allowance amount in raw token units.	answer inferred	owner, token, network, spender
1s_contract_info_live	Detect contract type and supported interfaces via eth_getCode and ERC165 supportsInterface. Use this for real-time standard detection; use 1s_contract_info for indexed metadata. Returns detected standards (ERC20, ERC721, ERC1155, ERC165).	answer inferred	address, network
1s_erc1155_balance_live	Get real-time ERC1155 token balance via balanceOf(address,uint256) RPC call. Use this when you need guaranteed current balance; use 1s_erc1155_balance for cached lookups. Returns the raw balance as a numeric string.	answer inferred	account, network, contract, token_id
1s_erc20_balance_live	Get real-time ERC20 token balance directly from the blockchain via balanceOf. Use this for pre-transaction checks or when zero indexing delay is needed; use 1s_erc20_balance for cheaper cached lookups. Returns raw token units (divide by 10^decimals); non-standard tokens may return empty name/symbol.	answer inferred	token, account, network
1s_erc20_transfers_live	Query ERC20 Transfer event logs via eth_getLogs. Use this for real-time transfer monitoring; use 1s_erc20_transfers for indexed transfer history. Block params are hex-encoded.	answer inferred	token, wallet, network, to_block, from_block
1s_erc721_tokens_live	Enumerate ERC721 tokens owned by an address via ERC721Enumerable. Only works for contracts that implement the Enumerable extension. Returns token IDs owned by the address.	not classified	owner, network, contract
1s_events_live	Query raw event logs via eth_getLogs directly from the node. Use this for real-time or unindexed events; use 1s_events for decoded, searchable indexed events. Block params are hex-encoded (e.g. 0x1234).	answer inferred	topic, network, contract, to_block, from_block
1s_multi_balance_live	Get ETH and multiple ERC20 balances in a single batched RPC call. Use this to check a wallet's holdings across multiple tokens efficiently. Individual token errors are returned per-token without failing the entire request.	answer inferred	tokens, address, network
1s_nft_metadata_live	Fetch NFT metadata directly from the blockchain via tokenURI/uri RPC call. Resolves all URI formats: ipfs://, ar://, data: URIs, bare CIDs, and ERC1155 {id} templates. Use this for freshest metadata; use 1s_nft_metadata for cached lookups.	answer inferred	network, contract, token_id
1s_nft_owner_live	Get the current NFT owner via ownerOf(tokenId) RPC call. Use this for real-time ownership verification; use 1s_nft_owner for cached lookups. Only works for ERC721 tokens.	answer inferred	network, contract, token_id
1s_total_supply_live	Get the total supply of an ERC20 or ERC721 token via totalSupply() RPC call. Use this for real-time supply data. Returns raw token units for ERC20 (divide by 10^decimals) or total count for ERC721.	answer inferred	token, network
1s_tx_details_live	Get full transaction data and receipt directly from the RPC node. Use this for very recent or unindexed transactions; use 1s_tx_details for enriched indexed data. Returns both transaction fields and receipt (status, gas used, logs).	answer inferred	hash, network
1s_contract_code	Get the deployed bytecode of a contract via eth_getCode. Returns '0x' for EOA (non-contract) addresses. Use this to verify whether an address is a contract before interacting with it.	answer inferred	address, network
1s_ens_resolve	Resolve ENS names to addresses (forward) or addresses to ENS names (reverse). Accepts either a .eth name or a 0x address. Only works on networks with ENS registry deployed (mainnet, sepolia).	answer inferred	input, network
1s_estimate_gas	Estimate gas required for a transaction via eth_estimateGas. Use this before sending transactions to set appropriate gas limits. Returns the estimated gas as a hex value; reverts return the revert reason.	answer inferred	to, data, from, value, network
1s_network_info	Get basic network information: chain ID, latest block number, and current gas price. Use this to verify which chain you are connected to or to check current gas conditions. Returns hex-encoded values; gas price is in wei.	answer inferred	network
1s_nonce	Get the transaction count (nonce) for an address via eth_getTransactionCount. Use this to set the correct nonce when constructing transactions. Returns the count as a hex value.	answer inferred	address, network
1s_pending_block	Get the current pending block from the mempool. Use this to see transactions waiting for inclusion. Not all nodes expose pending block data; results vary by RPC provider.	answer inferred	network
1s_proxy_detect	Detect if a contract is a proxy and read its implementation address. Checks EIP-1967 (transparent/UUPS/beacon) storage slots. Returns the proxy type, implementation address, and admin if applicable.	answer inferred	address, network
1s_simulate_call	Simulate a contract call via eth_call without sending a transaction. Use this to preview call results, decode return data, or check for reverts before sending. Returns the raw hex result or revert reason.	not classified	to, gas, data, from, value, network
1s_storage_read	Read a raw storage slot from a contract via eth_getStorageAt. Use this for low-level state inspection (e.g. reading proxy implementation slots, packed storage). Slot must be a hex-encoded 32-byte value.	answer inferred	slot, network, contract
1s_tx_receipt	Get a transaction receipt via RPC. Returns status (1=success, 0=revert), gas used, logs, and contract address if deployment. Use 1s_tx_details_live for both transaction data and receipt together.	answer inferred	hash, network
search_docs	Search OneSource documentation by keyword. Returns the top 5 matching sections.	answer inferred	query
get_query_reference	Get full reference for a OneSource root GraphQL query — arguments, filters, return type. There are 12 root queries: address, addresses, block, blocks, contract, contracts, nft, nfts, token, tokens, transaction, transactions.	answer inferred	query_name
get_type_definition	Get the schema definition for a GraphQL type, enum, scalar, input, or interface. Returns fields, values, and descriptions.	answer inferred	type_name
list_examples	List or search working GraphQL examples. Without a topic, returns a summary of all available examples. With a topic, returns full example content matching that keyword.	answer inferred	topic
list_supported_chains	List all blockchain networks supported by OneSource with endpoint URLs.	answer inferred	none
get_filter_reference	Get all filter fields and operators for a list query (e.g. transactions, tokens).	answer inferred	query_name
get_pagination_guide	Get the cursor-based pagination pattern with examples for a list query.	answer inferred	query_name
get_schema_overview	Get a high-level summary of the entire GraphQL schema — all queries, types, enums, and scalars.	answer inferred	none
get_authentication_guide	Get the authentication guide — API key format, endpoints, headers, and common mistakes.	answer inferred	none

Tool

What it does

Intent

Parameters

1s_address_txs

Get transaction history for an address (sent and received). Sorted by block number descending. Use from_block/to_block to narrow the range.

answer inferred

limit, address, network, to_block, from_block

1s_block

Get indexed block details by block number. Returns block metadata including timestamp, transaction count, and gas used. For the latest pending block, use 1s_pending_block instead.

answer inferred

network, block_number

1s_contract_info

Get indexed contract metadata including deployment info and detected standards. Use this for enriched contract data; use 1s_contract_info_live for real-time ERC standard detection via RPC.

answer inferred

address, network

1s_erc1155_balance

Get indexed ERC1155 token balance. Use this for cached lookups; use 1s_erc1155_balance_live for real-time data. Requires the contract address and specific token ID.

answer inferred

account, network, contract, token_id

1s_erc20_balance

Get indexed ERC20 token balance for a wallet. Use this for historical or cached balance lookups; use 1s_erc20_balance_live for real-time data. Returns token metadata (name, symbol, decimals) alongside the balance.

answer inferred

token, account, network

1s_erc20_transfers

Get ERC20 transfer history filtered by token and/or wallet. Use this for indexed transfer records; use 1s_erc20_transfers_live for raw Transfer event logs. Sorted by block number descending.

answer inferred

limit, token, wallet, network

1s_events

Search indexed event logs by contract address and/or event name. Use this for decoded, searchable events; use 1s_events_live for raw eth_getLogs against the node. Sorted by block number descending.

answer inferred

limit, network, contract, to_block, event_name, from_block

1s_nft_media

Get processed media files (images, videos, thumbnails) for an NFT. Use this to get optimized media URLs with dimensions and content types. Only returns successfully processed media (status=OK).

answer inferred

network, contract, token_id

1s_nft_metadata

Get NFT metadata including name, description, image URL, and traits from the index. Use this for enriched metadata; use 1s_nft_metadata_live to fetch directly from the token's URI. Excludes records with fetch errors.

answer inferred

network, contract, token_id

1s_nft_owner

Get the current owner of an NFT from the index. Use this for quick ownership checks; use 1s_nft_owner_live for guaranteed real-time data. Filters out zero-balance holders automatically.

answer inferred

network, contract, token_id

1s_tx_details

Get indexed transaction details with decoded event logs. Use this for rich transaction data; use 1s_tx_details_live for unindexed or very recent transactions. Returns both the transaction and up to 100 associated events.

answer inferred

hash, network

1s_wallet_nfts

Get a wallet's complete NFT portfolio with metadata enrichment. Returns ERC721 and ERC1155 tokens with names, images, and collection info. Results sorted by most recently updated.

answer inferred

limit, account, network

1s_allowance_live

Check ERC20 token allowance (approved spending amount) via the allowance(owner,spender) RPC call. Use this before executing transferFrom or to verify approvals. Returns the allowance amount in raw token units.

answer inferred

owner, token, network, spender

1s_contract_info_live

Detect contract type and supported interfaces via eth_getCode and ERC165 supportsInterface. Use this for real-time standard detection; use 1s_contract_info for indexed metadata. Returns detected standards (ERC20, ERC721, ERC1155, ERC165).

answer inferred

address, network

1s_erc1155_balance_live

Get real-time ERC1155 token balance via balanceOf(address,uint256) RPC call. Use this when you need guaranteed current balance; use 1s_erc1155_balance for cached lookups. Returns the raw balance as a numeric string.

answer inferred

account, network, contract, token_id

1s_erc20_balance_live

Get real-time ERC20 token balance directly from the blockchain via balanceOf. Use this for pre-transaction checks or when zero indexing delay is needed; use 1s_erc20_balance for cheaper cached lookups. Returns raw token units (divide by 10^decimals); non-standard tokens may return empty name/symbol.

answer inferred

token, account, network

1s_erc20_transfers_live

Query ERC20 Transfer event logs via eth_getLogs. Use this for real-time transfer monitoring; use 1s_erc20_transfers for indexed transfer history. Block params are hex-encoded.

answer inferred

token, wallet, network, to_block, from_block

1s_erc721_tokens_live

Enumerate ERC721 tokens owned by an address via ERC721Enumerable. Only works for contracts that implement the Enumerable extension. Returns token IDs owned by the address.

not classified

owner, network, contract

1s_events_live

Query raw event logs via eth_getLogs directly from the node. Use this for real-time or unindexed events; use 1s_events for decoded, searchable indexed events. Block params are hex-encoded (e.g. 0x1234).

answer inferred

topic, network, contract, to_block, from_block

1s_multi_balance_live

Get ETH and multiple ERC20 balances in a single batched RPC call. Use this to check a wallet's holdings across multiple tokens efficiently. Individual token errors are returned per-token without failing the entire request.

answer inferred

tokens, address, network

1s_nft_metadata_live

Fetch NFT metadata directly from the blockchain via tokenURI/uri RPC call. Resolves all URI formats: ipfs://, ar://, data: URIs, bare CIDs, and ERC1155 {id} templates. Use this for freshest metadata; use 1s_nft_metadata for cached lookups.

answer inferred

network, contract, token_id

1s_nft_owner_live

Get the current NFT owner via ownerOf(tokenId) RPC call. Use this for real-time ownership verification; use 1s_nft_owner for cached lookups. Only works for ERC721 tokens.

answer inferred

network, contract, token_id

1s_total_supply_live

Get the total supply of an ERC20 or ERC721 token via totalSupply() RPC call. Use this for real-time supply data. Returns raw token units for ERC20 (divide by 10^decimals) or total count for ERC721.

answer inferred

token, network

1s_tx_details_live

Get full transaction data and receipt directly from the RPC node. Use this for very recent or unindexed transactions; use 1s_tx_details for enriched indexed data. Returns both transaction fields and receipt (status, gas used, logs).

answer inferred

hash, network

1s_contract_code

Get the deployed bytecode of a contract via eth_getCode. Returns '0x' for EOA (non-contract) addresses. Use this to verify whether an address is a contract before interacting with it.

answer inferred

address, network

1s_ens_resolve

Resolve ENS names to addresses (forward) or addresses to ENS names (reverse). Accepts either a .eth name or a 0x address. Only works on networks with ENS registry deployed (mainnet, sepolia).

answer inferred

input, network

1s_estimate_gas

Estimate gas required for a transaction via eth_estimateGas. Use this before sending transactions to set appropriate gas limits. Returns the estimated gas as a hex value; reverts return the revert reason.

answer inferred

to, data, from, value, network

1s_network_info

Get basic network information: chain ID, latest block number, and current gas price. Use this to verify which chain you are connected to or to check current gas conditions. Returns hex-encoded values; gas price is in wei.

answer inferred

network

1s_nonce

Get the transaction count (nonce) for an address via eth_getTransactionCount. Use this to set the correct nonce when constructing transactions. Returns the count as a hex value.

answer inferred

address, network

1s_pending_block

Get the current pending block from the mempool. Use this to see transactions waiting for inclusion. Not all nodes expose pending block data; results vary by RPC provider.

answer inferred

network

1s_proxy_detect

Detect if a contract is a proxy and read its implementation address. Checks EIP-1967 (transparent/UUPS/beacon) storage slots. Returns the proxy type, implementation address, and admin if applicable.

answer inferred

address, network

1s_simulate_call

Simulate a contract call via eth_call without sending a transaction. Use this to preview call results, decode return data, or check for reverts before sending. Returns the raw hex result or revert reason.

not classified

to, gas, data, from, value, network

1s_storage_read

Read a raw storage slot from a contract via eth_getStorageAt. Use this for low-level state inspection (e.g. reading proxy implementation slots, packed storage). Slot must be a hex-encoded 32-byte value.

answer inferred

slot, network, contract

1s_tx_receipt

Get a transaction receipt via RPC. Returns status (1=success, 0=revert), gas used, logs, and contract address if deployment. Use 1s_tx_details_live for both transaction data and receipt together.

answer inferred

hash, network

search_docs

Search OneSource documentation by keyword. Returns the top 5 matching sections.

answer inferred

query

get_query_reference

Get full reference for a OneSource root GraphQL query — arguments, filters, return type. There are 12 root queries: address, addresses, block, blocks, contract, contracts, nft, nfts, token, tokens, transaction, transactions.

answer inferred

query_name

get_type_definition

Get the schema definition for a GraphQL type, enum, scalar, input, or interface. Returns fields, values, and descriptions.

answer inferred

type_name

list_examples

List or search working GraphQL examples. Without a topic, returns a summary of all available examples. With a topic, returns full example content matching that keyword.

answer inferred

topic

list_supported_chains

List all blockchain networks supported by OneSource with endpoint URLs.

answer inferred

none

get_filter_reference

Get all filter fields and operators for a list query (e.g. transactions, tokens).

answer inferred

query_name

get_pagination_guide

Get the cursor-based pagination pattern with examples for a list query.

answer inferred

query_name

get_schema_overview

Get a high-level summary of the entire GraphQL schema — all queries, types, enums, and scalars.

answer inferred

none

get_authentication_guide

Get the authentication guide — API key format, endpoints, headers, and common mistakes.

answer inferred

none

Command line alternative

None found. The published package declares no executable and no matching Homebrew formula exists, so the MCP server appears to be the only route. This is a negative result from automated checks, not a statement from the publisher.

Repository

Read from github on 2026-08-06.

Stars: 0
Forks: 1
Open issues: 6
Primary language: TypeScript
Licence: not declared by the publisher
Last commit: 2026-08-05
Latest release: no tagged release
Created: 2026-03-26
Repository files: readme, license, serverJson

Security, privacy and enterprise use

The publisher's website links no privacy policy, terms, security page or enterprise information that could be found automatically. It may still exist somewhere less obvious on their site.

Publisher

Website: mcp.onesource.io
Profiles: x
Community: no subreddit linked from the publisher's site

Review platforms

CAPTERRA G2 OMR TRUSTPILOT

Ratings are not shown. G2, Trustpilot and Capterra all prohibit republishing their scores without a licence, and marking up a borrowed rating as our own would breach search engine policy. These are profile links only, and a profile may not exist for every publisher.

Frequently asked questions

What does the OneSource MCP MCP server do?: 46 tools for blockchain data, Deepstate market data, live chain queries, and REST API documentation.
Do I need to install anything to use OneSource MCP?: Yes. OneSource MCP runs as a local process, so the package has to be installed on the machine where the client runs.
How do I install OneSource MCP?: Install the npm package @one-source/mcp and run it with npx -y @one-source/mcp.
Does OneSource MCP need an API key?: Yes. It reads 2 environment variables from the environment, so you need to supply X402_PRIVATE_KEY, ONESOURCE_API_KEY before the server will start.
What is X402_PRIVATE_KEY used for in OneSource MCP?: EVM private key (64-char hex, 0x prefix optional) for automatic x402 USDC payments on Base.
What is ONESOURCE_API_KEY used for in OneSource MCP?: OneSource API key for Bearer token auth.
Which transport does OneSource MCP use?: Stdio. Your client has to support that transport to connect.
Where is the source code for OneSource MCP?: The publisher lists https://github.com/blockparty-global/1s-mcp as the source repository.
Is OneSource MCP an official server?: It is published under the namespace io.onesource, which means the publisher proved control of that domain when registering. That confirms who published it, not that it has been reviewed for quality or security.
Which version of OneSource MCP is listed here?: Version 5.12.0, taken from the latest registry entry.

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OneSource MCP MCP server

Details

Packages

npm @one-source/mcp

Install OneSource MCP

Claude Code command line

Cursor IDE

Claude Desktop desktop app

Visual Studio Code IDE

Codex CLI command line

ChatGPT web app

Cline IDE

Goose desktop app

LangChain agent framework

Make automation platform

n8n automation platform

Windsurf IDE

Zapier automation platform

Zed IDE

Tools

Command line alternative

Repository

Security, privacy and enterprise use

Publisher

Review platforms

Frequently asked questions

Hive Intelligence MCP

MCP Holded

Multimeter

Macroaxis Financial Data

aus-accounting-mcp

Irs Taxpayer

Korea Stay

ccpcrate, Canadian CCPC corporate tax

Details

Packages

npm @one-source/mcp

Install OneSource MCP

Claude Code command line

Cursor IDE

Claude Desktop desktop app

Visual Studio Code IDE

Codex CLI command line

ChatGPT web app

Cline IDE

Goose desktop app

LangChain agent framework

Make automation platform

n8n automation platform

Windsurf IDE

Zapier automation platform

Zed IDE

Tools

Command line alternative

Repository

Security, privacy and enterprise use

Publisher

Review platforms

Frequently asked questions

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