# Provenance stamped 2026-10-07 (roadmap#943): written by an API Evangelist sweep (dated 2026-05-23 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: '2026-05-23'
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: Cantor Fitzgerald
providerId: cantor-fitzgerald
created: '2026-05-23'
modified: '2026-05-23'
reconciled: false
tags:
  - Rate Limiting
  - Financial Services
  - Investment Banking
  - Prime Brokerage
  - Market Data
description: Cantor Fitzgerald does not publish public rate limits. Throughput for institutional
  trading sessions (FIX, voice-broker booking, prime-brokerage activity) is governed by the
  per-client agreement and venue-imposed message-rate caps. Fenics Market Data throughput is
  bound by the upstream exchange/venue redistribution entitlement and the negotiated subscription
  level.
sources:
  - https://www.cantor.com
  - https://www.fenicsmd.com
  - https://www.bgcgroup.com
notes: Public rate-limit specifics not reachable without an onboarded institutional credential
  or signed market-data agreement; reconciled set to false.
responseCodes:
  throttled: 429
  serviceUnavailable: 503
limits:
  - name: FIX session message rate (institutional)
    scope: account
    metric: messages/sec
    limit: per-session cap set during onboarding
    notes: Trading FIX sessions are throttled per the per-client onboarding addendum and the
      destination venue's message-rate policy.
  - name: Prime brokerage throughput
    scope: account
    metric: varies
    limit: per client services agreement
    notes: Cantor Prime Services activity is sized at onboarding and managed by the client
      service representative.
  - name: Fenics Market Data feed entitlement
    scope: subscription
    metric: messages/sec, symbols, redistribution scope
    limit: per market-data agreement and upstream venue entitlement
    notes: Streaming, intra-day, end-of-day, and historical delivery throughput is bound by
      the negotiated subscription and the redistribution rights granted by the upstream venue.
policies:
  - name: Onboarding-driven sizing
    description: Throughput is sized during institutional onboarding and recorded in the client
      services or market-data agreement; raise via the coverage representative.
  - name: Entitlement separation
    description: Trading, post-trade, prime-brokerage, and market-data feeds carry independent
      entitlements and may throttle separately.
  - name: Idempotency and retries
    description: Trade-execution and post-trade messages should be idempotent and retried with
      backoff per venue specifications.
maintainers:
  - FN: Kin Lane
    email: kin@apievangelist.com