generated: '2026-08-30'
method: probed
source: live responses from registry.modelcontextprotocol.io and modelcontextprotocol.io/mcp, 2026-08-30, plus https://registry.modelcontextprotocol.io/docs
provider: Agentic AI Foundation
providerId: agentic-ai-foundation
description: >-
  No AAIF-hosted API publishes rate limits, and none was observed signalling any at runtime. Response
  headers on every probed call carried no X-RateLimit-*, no RateLimit-* and no Retry-After. An agent
  calling these surfaces has no runtime budget signal to read.
limit_count: 0
documented: false
headers_observed: []
headers:
  limit: null
  remaining: null
  reset: null
  retryAfter: null
  policy: null
responseCodes:
  throttled: null
  note: >-
    429 is not documented for any operation. The registry contract enumerates only 200 and a `default`
    RFC 9457 problem response per operation, so a throttling status would arrive through `default` with no
    contract-level warning.
evidence:
  - url: https://registry.modelcontextprotocol.io/v0/health
    status: 200
    headers_returned: [date, content-type, content-length, vary, strict-transport-security]
    finding: No rate-limit header of any family.
  - url: https://modelcontextprotocol.io/mcp
    method: POST tools/list
    status: 200
    finding: No rate-limit header; three consecutive calls all returned 200.
  - url: https://registry.modelcontextprotocol.io/docs
    status: 200
    finding: API documentation publishes no limits, quotas or throttling policy.
gaps:
  - >-
    The registry is a public, unauthenticated read surface that any agent can poll. Publishing even a
    conservative documented limit plus RateLimit-* headers would be the single cheapest agent-readiness
    improvement available to it.
supersedes: >-
  This file replaces a 2026-05-04 bulk-sweep scaffold that asserted free/professional/enterprise tiers at
  10/100/1000 requests per minute with X-RateLimit-* headers. None of that was ever published by this
  provider or observed on the wire; it was a generated default and is removed rather than carried forward.
maintainers:
  - FN: Kin Lane
    email: info@apievangelist.com