generated: '2026-08-31'
method: searched
source: https://sign-api.tvarka.pro/docs
docs:
  - https://sign-api.tvarka.pro/docs
  - openapi/tvarka-sign-api-openapi.yml
signal:
  status: 429
  problem_type: rfc9457 (application/problem+json)
  retry_header: null
  rate_limit_headers: []
  note: >-
    429 is declared on all 21 operations, but the contract publishes NO RateLimit-* headers, no
    Retry-After and no numeric quota, so an agent learns it is throttled only from the status code
    and cannot compute a backoff from the response.
  applies_to_operations: [addComment, addSigner, archiveSigning, cancelSigning, createBatch, createSigning, deleteFile, downloadSignedDocument, eraseSigning, eraseSignings, getBatch, getFile, getSigning, listComments, listSignings, remindSigner, removeSigner, simulateSigning, updateSignerMethods, updateSigning, uploadFile]
rate_limits:
  - scope: per-signer
    operation: remindSigner
    tool: remind_signer
    window: 1 hour
    limit: 1
    unit: reminder
    enforcement: 'documented in the docs page and in the MCP tool description; the contract returns 409/429 rather than naming the limit'
    source: https://sign-api.tvarka.pro/docs
limit_count: 1
published_quotas: false
size_limits:
  - scope: container composition
    limit: up to 20 files composed into one package
    source: https://sign-api.tvarka.pro/llms.txt
  - scope: signers per ceremony
    limit: 20
    source: 'openapi/tvarka-sign-api-openapi.yml -> request_signatures/createSigning signers maxItems 20'
other_throttles:
  - kind: commercial precondition
    status: 402
    operations: [createSigning, createBatch, addSigner]
    note: >-
      Not a rate limit, but the other way a write is refused at the gate. The problem body may carry
      recoveryUrl pointing a human operator at the tenant's payment setup.
note: >-
  An honest partial: exactly one numeric limit is published for this API. Everything else about
  throttling is undocumented, which is a real gap for an agent-facing surface that ships an MCP
  server.
related:
  atk_api: rate-limits/tvarka-atk-api-rate-limits.yml