generated: '2026-08-27'
method: searched
source: >-
  https://docs.simbachain.com/documentation/api-reference/common-error-codes (the only place a limit
  is acknowledged), the complete documentation index at
  https://docs.simbachain.com/documentation/llms.txt (HTTP 200, 100 pages — no rate-limit,
  quota, throttling or fair-use page), and anonymous response-header inspection of
  https://blocks.simbachain.com/api/member-service/healthz and /version on 2026-08-27.
description: >-
  SIMBA acknowledges throttling exists — error code 1429 TOO_MANY_REQUESTS maps to HTTP 429 in its
  published error reference — but publishes no numeric limit, no window, no scope and no runtime
  header. Anonymous 200 responses from the Blocks API carry only `server: istio-envoy` and
  `strict-transport-security`; no RateLimit-*, X-RateLimit-* or Retry-After header was present. An
  agent therefore has no runtime signal to pace itself with and can only react to a 429 after it
  happens, with no Retry-After to tell it how long to wait.
limit_count: 0
limits: []
headers:
  request: []
  response: []
  observed: []
response_codes:
  throttled: 429
  error_code: '1429'
  error_name: TOO_MANY_REQUESTS
  retry_after: not sent
retry_guidance_published:
  - >-
    Error 3012 RETRYABLE_TRANSACTION_ERROR (HTTP 503) explicitly marks a transaction failure as
    retryable, and SIMBA re-queues asynchronous transactions on recoverable errors (Blocks v23.8.1).
  - >-
    Error 3016 CONTRACT_TRANSACTION_NOT_FOUND_ERROR (HTTP 400) says "may still be processing, try
    again shortly" — a poll instruction rather than a rate limit.
  - >-
    Caution: because there is no idempotency key, retrying an ambiguous WRITE is not safe. See
    conventions/simba-chain-conventions.yml.
evidence:
  - url: https://blocks.simbachain.com/api/member-service/healthz
    status: 200
    note: No rate-limit headers in the response.
  - url: https://blocks.simbachain.com/api/member-service/version
    status: 200
    note: No rate-limit headers in the response.
  - url: https://docs.simbachain.com/documentation/api-reference/common-error-codes
    status: 200
    note: Defines 1429 TOO_MANY_REQUESTS / HTTP 429 with no accompanying limit.