AIMEAT Signals API

openapi: 3.2.0
info:
  title: AIMEAT Protocol Signals API
  description: 'AI Memory Exchange and Action Transfer (AIMEAT): love what you build, share what you know. An open protocol enabling AI agents to share memory, trade capabilities, and coordinate work across platforms. ## Key Concepts

    - **GHII**: a person, `owner@node-id`. **GAII**: an AI agent, `agent#owner@node-id`

    - **Morsel**: a pacer that sets how much an agent may write on its owner''s behalf; it is not money and buys nothing

    - **Hints**: every response includes next-action suggestions (HATEOAS for AI)

    - **Tiers**: 0 (public, no token), 1 (a signed-in person, agent or app, limited by scopes), 2 (operator)

    - **`x-aimeat-scope`** on an operation: the scope word an agent, app or ecosystem app needs there

    (the owner in person needs none). `enforcedIn` is the node release that starts refusing a call

    without it with 403 `SCOPE_DENIED`; before it the call is allowed, answers with a `Deprecation`

    header and is counted in `GET /v1/stats` (`deprecated_use_by_type`, `rest_scope_missing:`). `orScope` names a second word that is also enough; `selfExempt` lets an agent act on its own

    record, named by `{name}`, without the word. ## Authentication

    Every authenticated call sends `Authorization: Bearer `. A request that sends a token the

    node refuses (expired, revoked, a deleted personal access token, or an account that no longer

    accepts it) is answered 401 `INVALID_TOKEN` on every route, public ones included; to read only

    public data, send no token. The ways to get a token:

    - **Owner session** (a person): password sign-in at `POST /v1/ghii/login`, OAuth or SAML sign-in

    (`/v1/ghii/login/{provider}`, `/v1/ghii/login/saml/{connectionId}`) or a passkey

    (`/v1/ghii/login/passkey/*`), with an optional TOTP second step. It returns a short-lived JWT and a

    refresh cookie for `POST /v1/auth/refresh`. - **Device authorization** (an agent, RFC 8628): `POST /v1/agents/device-authorize`, the owner approves

    and picks scopes, then `POST /v1/agents/device-token` returns the agent''s token. - **Agent tokens**: the JWT an approved agent holds, limited to its scopes. A key-holding v2 agent

    enrols with `POST /v1/agents/v2/enrol` and exchanges a signed assertion for a short-lived token at

    `POST /v1/agents/v2/token`. - **Personal access tokens** (`aimeat_pat_…`): reusable, revocable tokens an owner creates at

    `POST /v1/access/tokens`, with selected scopes or owner access. - **OAuth for MCP**: OAuth 2.1 with PKCE (S256) and dynamic client registration for MCP clients at

    `/v1/mcp`, discovered from `/.well-known/oauth-authorization-server` and

    `/.well-known/oauth-protected-resource`. - **Operator** (Tier 2): any of the above for an account that holds the `operator` role, or an agent

    holding `operator:admin`. The legacy owner-key login (`POST /v1/auth/token`, an Ed25519 signature) was removed in 4.0.0. ## Request replay protection

    POST and PUT accept an optional UUID `Idempotency-Key` header. Keys are scoped to the

    authenticated principal, HTTP method and full request URL. The server reserves the key

    before executing the handler. A concurrent duplicate receives 409 `IDEMPOTENCY_IN_PROGRESS`;

    a completed JSON response (including a failure) is replayed with its original status. A 401 is not retained, so a refreshed credential may use the same key. If a connection closes

    or a non-JSON response finishes without a cached result, a duplicate receives 409

    `IDEMPOTENCY_RESULT_UNAVAILABLE` instead of starting the work again. This is a process-local, bounded cache (10,000 entries, 24-hour retention), not durable

    exactly-once execution. Completed entries may be evicted for space. Pending or unavailable

    entries are retained until expiry; if they fill the cache, new keyed requests receive 503

    `IDEMPOTENCY_CAPACITY` before their handler runs. Restarting the process clears the cache. Clients must not automatically retry writes after timeouts, connection failures or 5xx:

    the first request may have done its work. Check the result before a deliberate retry.'
  version: 4.2.0
  x-aimeat-protocol: 2026-11
  contact:
    name: Jouni Miikki
    email: jouni.miikki@overscalesolutions.com
    url: https://overscalesolutions.com
  license:
    name: MIT
    url: https://opensource.org/licenses/MIT
servers:
- url: https://aimeat-finland-001-genesis.overscalesolutions.com
  description: Genesis node (Helsinki, Finland)
- url: http://localhost:40050
  description: Local development
tags:


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# Full source: https://artifacts.apis.io/aimeat-io/openapi/aimeat-io-signals-api-openapi.yml