aid: conceptnet
name: ConceptNet Rate Limits
description: >-
  ConceptNet enforces rate limits on the public API at api.conceptnet.io to
  ensure fair use across all consumers. No authentication is required.
  Rate-limited requests return HTTP 429 responses.
limits:
  - name: Hourly Limit
    description: Maximum number of requests allowed per hour per IP address.
    requests: 3600
    period: 1 hour
    unit: requests per hour
  - name: Burst Limit
    description: Short-term burst allowance per minute.
    requests: 120
    period: 1 minute
    unit: requests per minute
  - name: Sustained Rate Target
    description: >-
      Users should target an average of fewer than 1 request per second
      over any sustained period to remain within acceptable usage.
    requests: 1
    period: 1 second
    unit: requests per second (average target)
notes:
  - >-
    The /related and /relatedness endpoints count as 2 requests toward the
    rate limit quota because they perform additional computation using
    ConceptNet Numberbatch word embeddings.
  - >-
    For high-volume use cases, users are encouraged to self-host ConceptNet
    using the open-source codebase and downloaded data files.
  - >-
    Rate limits are enforced per IP address. No API keys are issued or
    required to access the public API.
  - >-
    Exceeding rate limits returns HTTP 429 Too Many Requests. Users should
    implement exponential backoff when retrying after rate-limit responses.