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Arbitron

Official registry Productivity

Crypto perp funding, spreads and listings, plus your own Arbitron cards, trades, PnL and docs.

Source code Website Documentation

Install

Add this to your client's MCP configuration (Claude Desktop: claude_desktop_config.json; Cursor: .cursor/mcp.json; VS Code and others use the same "mcpServers" shape).

Remote (streamable-http)
Claude Code 
claude mcp add --transport http arbitron 'https://arbitron.app/mcp'
JSON configuration (Claude Desktop, Cursor, VS Code) 
{
    "mcpServers": {
        "arbitron": {
            "type": "http",
            "url": "https://arbitron.app/mcp"
        }
    }
}

Documentation

From the project's README on GitHub, refreshed weekly. Links open on GitHub.

Contents
  1. Arbitron API and MCP server
  2. REST in one minute
  3. MCP in one minute
  4. Plans
  5. Citing
  6. Contents of this repository

Arbitron API and MCP server

Read-only market data for crypto perpetual futures across the venues Arbitron tracks: current funding rates, funding history, the spread between two venues right now, the scanner's backtested spreads, and the listings calendar. Two doors to the same data: a REST API for programs and an MCP server for AI assistants.

This repository holds the public artefacts of that product so they can be pinned, diffed and cited. The service itself is closed source.

WhatWhere
Developer guidehttps://arbitron.app/developers (Markdown twin: https://arbitron.app/developers/index.md)
API reference (Scalar)https://arbitron.app/developers/reference
OpenAPI 3.1 documenthttps://arbitron.app/api/v1/openapi.json (a copy: openapi/openapi.json)
MCP serverhttps://arbitron.app/mcp (Streamable HTTP; registry entry app.arbitron/mcp: mcp/server.json)
Server cardhttps://arbitron.app/.well-known/mcp/server-card.json
Plans and keyshttps://arbitron.app/developers#plans, keys at https://arbitron.app/settings/api
llms.txthttps://arbitron.app/llms.txt

REST in one minute

export ARBITRON_KEY=arb_live_...   # https://arbitron.app/settings/api

# The most negative funding on liquid contracts
curl -s "https://arbitron.app/api/v1/funding?max_rate_pct=-0.01&min_volume_usdt=1000000&sort=rate_asc&limit=5" \
  -H "Authorization: Bearer $ARBITRON_KEY"

# The spread between venues right now, tradeable pairs only
curl -s "https://arbitron.app/api/v1/spreads?min_volume_usdt=500000&max_spread_pct=3&min_strength=2&fields=symbol,exchange_a,exchange_b,spread_pct,direction" \
  -H "Authorization: Bearer $ARBITRON_KEY"

Every response is { "data": ..., "meta": { "as_of", "delayed_seconds", "source", "url", "count", "total", "next_cursor" } }. Errors are RFC 9457 problem details. Rates are percent per settlement. More in examples/.

MCP in one minute

Claude Desktop, Cursor and ChatGPT connect with OAuth 2.1 (sign in with your Arbitron account); a program connects with the same API key as a bearer token. Client configurations are in mcp/clients/. Nine read-only tools: arbitron_search_coins, arbitron_get_funding_rates, arbitron_get_coin_funding, arbitron_get_funding_history, arbitron_get_spreads, arbitron_get_spread_backtest, arbitron_get_listings, arbitron_get_exchanges, arbitron_get_usage.

Plans

The Demo plan is free: 15-minute delayed data, 50 rows per page, no history. Paid plans (Developer, Pro, Business) are live, reach further back, and include commercial use. Details at https://arbitron.app/developers#plans.

Citing

Attribute republished figures as "Data: Arbitron" with a link to meta.url, and keep meta.as_of with the number. Name the exchange and the settlement interval beside any funding rate.

Contents of this repository

  • openapi/openapi.json: the OpenAPI document as served, refreshed by scripts/refresh.sh.
  • mcp/server.json: the manifest published to the official MCP registry.
  • mcp/clients/: configuration snippets for Claude Desktop, Cursor and ChatGPT.
  • examples/: curl, Python and Node examples.
  • plugin.json and mcp.json: the Agent Plugins 1.0 package (Open Plugins standard), so clients and directories that read it discover the MCP server from the repository root.
  • .cursor-plugin/: the plugin manifest for the Cursor marketplace.

Files here are licensed under the MIT License. The data the API returns is subject to the terms.

Frequently asked questions

What is Arbitron?

Crypto perp funding, spreads and listings, plus your own Arbitron cards, trades, PnL and docs.

How do I install Arbitron?

It runs as a remote server. In Claude Code: claude mcp add --transport http arbitron 'https://arbitron.app/mcp'. For other clients, paste the JSON configuration from this page into their MCP settings.

Does Arbitron need an API key?

Its registry entry lists no required key or secret. Some features may still need an account with the service it connects to.

Is Arbitron open source?

Yes. Its code is on GitHub under the MIT license.

Who maintains Arbitron?

It is published by arbitron-team. AI.tn lists it but does not maintain or endorse it.

From the official MCP Registry. Listing is not an endorsement: review a server's code and permissions before giving it access to your data.