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OneSource MCP

Queries live blockchain state, Deepstate markets, The Standard Reserve, and OneSource API documentation through MCP tools.

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Install OneSource MCP

Pick your client, then add it in one click or paste the config.

STDIONode.js
~/Library/Application Support/Claude/claude_desktop_config.json
claude_desktop_config.json
{
  "mcpServers": {
    "onesource-mcp": {
      "command": "npx",
      "args": [
        "-y",
        "@one-source/mcp@latest"
      ]
    }
  }
}

Settings → Developer → Edit Config, merge this into mcpServers, then fully quit and reopen Claude Desktop.

Automated check passed— started and listed 99 tools correctly (Today).

Overview

OneSource MCP MCP server exposes the OneSource blockchain API and its REST documentation through MCP tools. It supports live EVM queries, chain utilities, Deepstate market data on Robinhood Chain, and indexed data from The Standard Reserve. Run it over stdio with npx or start a local HTTP endpoint for clients that connect by URL. Reach for it when an agent needs blockchain state, market analytics, reserve data, or guidance on the OneSource API.

Use cases

  • Query live ERC-20, ERC-721, and ERC-1155 blockchain state
  • Inspect Deepstate order books and market activity
  • Analyze The Standard Reserve auctions and backing
  • Look up OneSource API documentation from an agent
  • Run blockchain queries through a local HTTP endpoint

Key features

  • Live EVM balances, events, transactions, and contract reads
  • Deepstate order books, trades, candles, and maker analytics
  • The Standard Reserve state and auction data
  • stdio and self-hosted HTTP transports
  • x402 and MPP payment mode support
  • OneSource REST API documentation tools

Tools99

What OneSource MCP lets your agent do. Expand a tool for its parameters.

Verified live~29.9k tokens of context

Security & health

What it can reach and how reliably it runs — from our own checks, not the maintainer’s claims.

ActiveLast checked Today

Recent health check succeeded.

10/10 checks healthy over the last 55d

What it can do

From the 99 tools this server returned when we ran it; 99 declare their own safety hints.

Runs commands · 1Can delete or modify data · 1Handles credentials · 36Makes network requests · 8Read-only tools · 97
Network at startup4 connections
Files written at startupNone
Install scriptsprepare
npm provenanceNot published
Package age220 days
Maintainers3

Observed 2026-11-02 in an isolated sandbox. A description of reach, not a security audit.

Supply-chain signal

No high-severity advisories surfaced by our automated scan.

Critical 0High 0Medium 0Low 0

Scanned 9h ago via OSV.dev · @one-source/mcp@latest (npm)

Adoption & maintenance

Factual signals from GitHub, npm, and our automated checks — not a rating.

npm downloads2.2kPackage downloads in the last 30 days.
Last commit5d agoMost recent push to the default branch.
Availability100%Our rolling endpoint + install checks that succeeded.
Install checkPassedOur sandbox started it and listed its tools.
Tools exposed99Callable tools this server registers over MCP.

How OneSource MCP works

What OneSource MCP does

OneSource MCP connects an MCP-compatible AI client to the OneSource API. Its tools cover live blockchain reads such as token balances, allowances, transfers, NFT ownership and metadata, event logs, transaction details, contract information, and total supply. Chain utility tools expose blocks, chain IDs, gas estimates, bytecode, ENS resolution, nonces, pending blocks, proxy detection, simulated calls, storage reads, and receipts.

The server also provides market data for Deepstate, an on-chain order-book protocol on Robinhood Chain, including markets, books, trades, candles, rolling statistics, maker analytics, cost-to-quote data, depth history, 2DEEP information, and migration progress. Separate tools read indexed state from The Standard Reserve, including verified addresses, auctions, backing, supply, vaults, policy, and related protocol data. OneSource API documentation is exposed as tools alongside the data APIs.

How it works

The default transport is stdio. An MCP client launches the package with npx -y @one-source/mcp@latest, then discovers and calls the available tools. The server can also run as a self-hosted HTTP service with --http; clients connect to the local root URL, and /health provides a health check.

Deepstate queries always target Robinhood Chain and do not accept a network parameter. Most Deepstate tools require a market identifier; call the markets tool first to obtain a canonical slug or book ID. Standard Reserve responses include the data basis, source block, and serving state, and several tools can read historical state using an atBlock parameter.

Setup and configuration

For Claude Code, register the package with:

Terminal
claude mcp add onesource -- npx -y @one-source/mcp@latest

Claude Desktop and Cursor can use an MCP entry whose command is npx and whose arguments are -y, @one-source/mcp@latest. Any stdio-capable MCP client can launch the package directly.

To run HTTP locally, use npx -y @one-source/mcp@latest --http. The default endpoint is http://localhost:3000/; pass --port=8080 or another port to change it. Payment tools support an API key, x402, or MPP. The payment mode tool selects among x402 exact or batch on Base and MPP charge or session on Tempo; refund can reclaim unused channel deposits.

Tools and capabilities

  • Query live EVM balances, allowances, transfers, events, NFTs, contracts, transactions, blocks, and receipts.
  • Inspect chain metadata, bytecode, storage, nonces, gas, proxies, ENS names, and simulated calls.
  • Read Deepstate order books, trade history, candles, statistics, maker metrics, and depth data.
  • Examine The Standard Reserve addresses, auctions, backing, supply, and historical protocol state.
  • Select payment rails and reclaim unused payment-channel deposits.
  • Access REST API documentation through MCP tools.

Limitations and notes

Deepstate data is specific to Robinhood Chain, whose chain ID is 4663. Its market tools are paid like other API tools, except that the market-listing query supplies the market identifiers needed by the other calls. Maker reward tokens can vary by market, so consumers should read each market's reward_token rather than assume a fixed token.

The Standard Reserve tools describe indexed contract state rather than direct arbitrary contract queries. Most of those tools are paid, while the verified-address and genesis tools are free. Historical reads are available only on the tools that expose the atBlock option.

Read the full README View source on GitHub

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Frequently Asked Questions about OneSource MCP

OneSource MCP is an MCP server that connects AI clients to the OneSource blockchain API and documentation. Its main tools query live EVM state, chain utilities, Deepstate market data, The Standard Reserve, payment modes, refunds, and REST API references. It runs over stdio or as a self-hosted HTTP service.

Install it by launching `npx -y @one-source/mcp@latest` from an MCP client. Claude Code can register it with `claude mcp add onesource -- npx -y @one-source/mcp@latest`; Claude Desktop and Cursor use an MCP configuration entry with the same command and arguments.

Yes, OneSource MCP works with Cursor through its MCP configuration. Add a server named `onesource` with `npx` as the command and `-y`, `@one-source/mcp@latest` as the arguments.

Run `npx -y @one-source/mcp@latest --http` to start the HTTP server. It listens at `http://localhost:3000/` by default; use `--http --port=8080` to choose another port. The health endpoint is `/health` on the selected port.

Deepstate data uses Robinhood Chain, chain ID 4663. Deepstate tools do not take a network parameter, and most require a market slug or 32-byte book ID obtained from the markets query.

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