Directory/MCP Directory/Cosign

Cosign MCP server

Official a16z-hosted server over Streamable HTTP with OAuth 2.1 (PKCE) sign-in, free with a Cosign account.

  • Liveat last check
  • Sign in (OAuth)sign-in
  • Newuptime, last 30 checks

Server URL

https://api.cosign.co/mcp

Live checked 59 minutes ago

How to connectCosign review

Is the Cosign MCP server up?

Live Checked 59 minutes ago, answered in 548 ms

Answered with an MCP sign-in challenge, so the server is up and asks for your account.

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What can an AI assistant do with Cosign?

Cosign shares its tool list only after you sign in, so these capabilities come from the listing and Cosign's own documentation. Your AI app shows the exact tools once it is connected.

Things recruiters ask tools like this

  • “Find ten backend engineers in Denver with Go and fintech experience, and tell me why each one fits.”
  • “Build a list of nurse managers near Tampa who have been in their current role for three years or more.”

What the Cosign MCP server does

First-party MCP at api.cosign.co/mcp. Official a16z-hosted server over Streamable HTTP with OAuth 2.1 (PKCE) sign-in, free with a Cosign account. Members can find people, companies and jobs, read their own connection requests, and edit their profile, lists, requests and saved jobs; company scopes cover companies you manage. Request member:read for a read-only connection, since leaving scopes out grants read and write. Limits are 120 requests a minute per connection, and AI tools share 3 a minute, 20 an hour and 60 a day per account.

Run by
Cosign (official server)
Categories
Sourcing, Job boards
Starting price
Free, with a free plan

Read the full Cosign review: pricing, pros and cons, alternatives

Server facts

Sign-in
Sign in (OAuth)
Observed
Sign-in handled by
api.cosign.co
Observed
Permission scopes
member:read, member:write, company:read, company:write
Observed
Transport
Streamable HTTP
Observed
Last response time
548 ms
Observed
First checked
Nov 2, 2026, 1 checks since
Observed

Observed means our own checker saw it at the server URL, without signing in. Nothing here is copied from the vendor's marketing. Server details refresh weekly; last refreshed Nov 2, 2026.

How to connect Cosign to Claude, ChatGPT or Cursor

When you add it, your AI app opens a sign-in window for Cosign. Log in with your own Cosign account and approve access. Nothing to copy or paste beyond the URL.

Server URLhttps://api.cosign.co/mcp

Claude on the web or desktop

  1. Go to Customize, then Connectors.
  2. Click Add custom connector, name it Cosign and paste the server URL.
  3. Click Add, then sign in to Cosign when asked.
  4. In a chat, open the + menu and switch it on under Connectors.

On Team and Enterprise plans an owner adds it first under Organization settings.

Claude Code

  1. Run claude mcp add --transport http 'cosign' 'https://api.cosign.co/mcp'
  2. Type /mcp to check it shows as connected and to sign in.

Cursor

  1. Open Settings, then MCP, and add a new server.
  2. Paste {"mcpServers":{"cosign":{"url":"https://api.cosign.co/mcp"}}}
  3. Reload, then ask in the agent chat.

ChatGPT, Grok and others

  1. Add a custom connector or remote MCP server where your app and plan allow it.
  2. Paste the server URL. Transport is Streamable HTTP.

Steps follow Anthropic's guides to custom connectors and MCP in Claude Code. Menu names change, so check there if a label looks different. Start read only and keep sends, writes and credit spend on approval.

Questions

Does Cosign have an MCP server?

Yes. Cosign runs its own official MCP server at https://api.cosign.co/mcp, so an AI assistant such as Claude, ChatGPT or Cursor can work inside Cosign with your own account and permissions.

What is the Cosign MCP server URL?

The server URL is https://api.cosign.co/mcp. Paste it into your AI app as a custom connector or remote MCP server.

Do I need to sign in to use it?

Yes. You sign in with your own Cosign account when you add the connector, and the assistant only sees what your account can see.

Is the Cosign MCP server working right now?

At our last check, 59 minutes ago, it was live. Answered with an MCP sign-in challenge, so the server is up and asks for your account.

Is it safe to connect Cosign to AI?

An official server only lets the assistant see and do what your own Cosign account allows. Start read only, keep anything that sends, writes or spends credits on approval, and check whether your admin needs to approve the connection.

More MCP servers for sourcing and candidate search

Full MCP Directory

From the Work Insiders directory, where Cosign's MCP server is checked against Cosign's own documentation. Status is checked once a day, so it can lag a real outage by up to a day. Vendors cannot pay to be listed here. How we make money.