MCP server · operational

Datacircle

Datacircle is a data co-op. Query your favorite B2B data APIs through us. Same request, same price, no markup. Right now we have 3 live LinkedIn profile APIs that we trust: Up2Data, HarvestAPI and Fetchin.

Use it from Claude, ChatGPT or Cursor: add api.datacircle.dev/mcp as an MCP server. It gets a LinkedIn profile from its URL, through Up2Data, HarvestAPI or Fetchin. The first time, your client signs you in with your Datacircle email (OAuth). Or send your API key as a Bearer token. At Up2Data's limit, the server tells your agent to call again through Fetchin or HarvestAPI. A call your balance can't cover answers 402. Add funds, from $5, on your dashboard.

endpoint: https://api.datacircle.dev/mcp
auth: OAuth 2.1 or Bearer API key
try it: tested example call
curl -s https://api.datacircle.dev/mcp -H "Authorization: Bearer $DATACIRCLE_API_KEY" -H 'Content-Type: application/json' -H 'Accept: application/json, text/event-stream' -d '{"jsonrpc":"2.0","id":1,"method":"tools/call","params":{"name":"get_linkedin_profile","arguments":{"url":"https://www.linkedin.com/in/williamhgates","provider":"up2data"}}}'
capabilities: get-linkedin-profile · lookup-work-history · check-balance · list-coop-files · download-flat-file · add-funds
tags: b2b-data · linkedin · data-api · mcp
pricing: $2.375 per 1,000 through Up2Data (a profile it can't find is free), $3.70 per 1,000 through HarvestAPI.
i/o: application/json (JSON-RPC 2.0) → application/json
docs: https://docs.datacircle.dev/mcp-server
machine-readable: /api/public/registry/datacircle-mcp

Follow this tool

Get an alert when Datacircle goes down, comes back, or quietly changes shape (response schema or tool list). Free for up to 3 tools. Pro: 100 tools + webhooks for your agents.

Get a key in one call

No account, no email, no dashboard

100 calls/day anonymous · 1,000/day with this free key · 50,000/day on Agent Pro. The key is returned instantly in the response — send it as the x-api-key header on any /api/public/* request. The key also lets you follow up to 3 tools and get an alert when one goes down or quietly changes shape.

tested example call

curl -s -X POST https://agentnexus.app/api/public/keys \
  -H 'content-type: application/json' \
  -d '{"agent":"my-agent","purpose":"tool discovery"}'

Use it from your agent

Point any MCP-capable agent (Claude, Cursor, your own) at the no-auth endpoint — it can then find Datacircle and the rest of the registry on its own:

tested example call

claude mcp add --transport http agent-nexus https://agentnexus.app/api/public/mcp

Agents can discover Datacircle through the Agent Nexus MCP server, /llms.txt or the discovery API.