# Provenance stamped 2026-10-07 (roadmap#943): written by an API Evangelist sweep (dated 2026-06-13 by the file itself), not
# harvested from the provider. `method: generated` so the economics campaign may replace it with a
# dated, verbatim transcription; every figure below is unverified until it does.
method: generated
generated: '2026-06-13'
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: Taylor & Francis
providerId: taylor-francis
created: '2026-06-13'
modified: '2026-06-13'
tags:
  - Academic
  - Books
  - Journals
  - Metadata
  - Publishing
  - Research
  - Text Mining
  - Rate Limiting
  - Quotas
  - Throttling
description: >-
  Machine-readable rate limit definitions for the Taylor & Francis API surface.
  Taylor & Francis does not publicly publish explicit per-minute rate limits for
  its institutional APIs; the values below represent scaffold defaults derived
  from comparable academic publisher APIs and Taylor & Francis TDM guidance.
  Replace with confirmed limits obtained from Taylor & Francis support or your
  institutional account manager.
headers:
  limit: X-RateLimit-Limit
  remaining: X-RateLimit-Remaining
  reset: X-RateLimit-Reset
  retryAfter: Retry-After
  policy: RateLimit-Policy
responseCodes:
  throttled: 429
  quotaExceeded: 429
  serviceUnavailable: 503
limits:
  - tier: institutional
    name: Institutional Subscriber Default
    scope: api-key
    metric: requests_per_minute
    limit: 60
    burst: 120
    timeFrame: minute
    applies:
      - Taylor & Francis Content API
      - Taylor & Francis KBART Holdings API
      - Taylor & Francis SUSHI / COUNTER 5 API
  - tier: institutional
    name: Institutional Monthly Quota
    scope: api-key
    metric: requests_per_month
    limit: 10000
    timeFrame: month
    applies:
      - Taylor & Francis Content API
      - Taylor & Francis KBART Holdings API
      - Taylor & Francis SUSHI / COUNTER 5 API
  - tier: tdm
    name: TDM Access Default
    scope: api-key
    metric: requests_per_minute
    limit: 30
    burst: 60
    timeFrame: minute
    applies:
      - Taylor & Francis Text and Data Mining API
  - tier: tdm
    name: TDM Monthly Quota
    scope: api-key
    metric: requests_per_month
    limit: 50000
    timeFrame: month
    applies:
      - Taylor & Francis Text and Data Mining API
  - tier: enterprise
    name: Enterprise Negotiated Limit
    scope: contract
    metric: requests_per_minute
    limit: 500
    burst: 1000
    timeFrame: minute
    applies:
      - Taylor & Francis Content API
      - Taylor & Francis KBART Holdings API
      - Taylor & Francis SUSHI / COUNTER 5 API
      - Taylor & Francis Text and Data Mining API
policies:
  - name: Backoff Strategy
    description: >-
      Clients should implement exponential backoff with jitter, honoring the
      Retry-After header when present after a 429 response.
  - name: Burst Handling
    description: >-
      Short bursts above the steady-state limit are tolerated up to the
      documented burst ceiling before throttling engages.
  - name: Quota Reset
    description: >-
      Monthly quotas reset at the start of each calendar month in UTC.
      Per-minute windows reset on a sliding-window basis.
  - name: Fair Use
    description: >-
      Even on uncapped enterprise tiers, sustained usage that materially impacts
      shared infrastructure may be subject to fair-use throttling.
  - name: TDM Pre-Notification
    description: >-
      Institutions must notify Taylor & Francis in writing at
      support@tandfonline.com before commencing text and data mining activities
      to ensure appropriate technical assistance and rate-limit coordination.
maintainers:
  - FN: Kin Lane
    email: kin@apievangelist.com