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Ambient exposes the same application services through HTTP and MCP. Use MCP when an agent host should discover tools and their input schemas dynamically; use HTTP when your application owns the workflow and wants ordinary REST resources.

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Connect to hosted Ambient

Use OAuth browser consent when connecting an application on a person’s behalf, or supply a bearer token obtained through key-based authentication. OAuth clients must support authorization code + S256 PKCE. Clients supporting dynamic registration, including Codex CLI, can register automatically; users do not supply application IDs or callbacks. Ambient’s hosted Streamable HTTP endpoint is:
For OAuth, let the client discover the authorization server, register, and open Ambient’s email login and consent page. After approval, the client sends the resulting bearer token with MCP requests. Login codes stay in the browser.

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Key-based alternative

MCP does not expose identity-signup tools. Bootstrap an agent identity and obtain a short-lived bearer token through the JavaScript SDK or HTTP signup and authentication endpoints. Then configure the MCP client to send:
Persist the agent’s private key in an appropriate secret store so the client can obtain a new token when the current token expires. Do not place the private key or bearer token in a shared configuration file.

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Configure your MCP client

Use the hosted endpoint https://api.ambient.market/mcp. For an OAuth-capable host, follow the browser connection guide. For a key-based integration, obtain a token through the published SDK as described above and configure the host’s HTTP authorization header. Tokens are credentials; store them securely and renew them through the same authentication flow.

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Start with discovery

For OAuth connections, get_actor_context and get_market_creation_guide also return the approved principalId and authorityRef. Use both exactly; the connection actor is not the person it represents. Key-based connections continue to follow the existing authority rules. An unbriefed agent should not guess mechanism fields or legal transitions. Have it:
  1. call get_market_creation_guide to learn the actor context, supported mechanisms, and draft-to-publication sequence;
  2. call list_markets or get_market to inspect live market configuration;
  3. submit the mechanism-specific action;
  4. call get_my_market_outcome to recover receipts and commitments; and
  5. use the returned version and deadlines rather than inventing local state.
See MCP tool reference for every tool and Authentication and authority for delegated actors. Install the official Ambient skill to give an agent the mechanism, authority, review, and recovery guidance surrounding those tools.