specification: API Commons Rate Limits
specificationVersion: '0.1'
schema: https://raw.githubusercontent.com/api-evangelist/interface-research/main/schema/api-commons.yml#/$defs/RateLimits
provider: Tiingo
providerId: tiingo
created: '2026-05-08'
# Provenance stamped 2026-08-11: this artifact was written by the API Evangelist
# bulk sweep dated 2026-05-08, not harvested from the provider. See roadmap#35.
method: generated
modified: '2026-05-08'
reconciled: false
tags:
  - Fintech
  - Market Data
  - Rate Limiting
description: >-
  Tiingo enforces hourly request caps that vary by plan. The free Power User plan permits roughly
  50 requests per hour; the Commercial plan permits roughly 5,000 requests per hour. Symbol-level
  request caps and unique-symbol caps also apply. WebSocket connections are limited per token.
notes: Limits partially reconciled - documentation page was minimally accessible during research;
  figures reflect long-standing published values.
sources:
  - https://www.tiingo.com/documentation/general/overview
  - https://www.tiingo.com/about/pricing
responseCodes:
  throttled: 429
limits:
  - name: Power User (Free) - hourly
    scope: token
    metric: requests_per_hour
    limit: 50
  - name: Commercial - hourly
    scope: token
    metric: requests_per_hour
    limit: 5000
  - name: Daily unique symbols (Free)
    scope: token
    metric: unique_symbols_per_day
    limit: 500
  - name: WebSocket connections
    scope: token
    metric: concurrent_connections
    limit: 1
    notes: One WebSocket connection per token; multiplex symbols within it.
policies:
  - name: Backoff Strategy
    description: On 429 honor any Retry-After header and apply exponential backoff with jitter.
  - name: Symbol Multiplexing
    description: Subscribe to multiple symbols within a single WebSocket connection to stay under connection cap.
maintainers:
  - FN: Kin Lane
    email: kin@apievangelist.com