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: Calypso Migration
providerId: calypso-migration
generated: '2026-09-05'
created: '2026-05-04'
modified: '2026-09-05'
method: searched
source: >-
  https://www.nasdaq.com/products/fintech/calypso ,
  https://www.nasdaq.com/products/fintech/calypso/delivery-management-and-services
supersedes: >-
  This file replaces a 2026-05-04 bulk-sweep scaffold that invented free /
  professional / enterprise limits (10, 100 and 1,000 requests per minute, with
  bursts and monthly quotas) and an X-RateLimit-* / Retry-After header contract,
  for an API that has no public endpoint. Nasdaq has never published any of it.
  The invented values are removed rather than carried forward.
limit_count: 0
limits_published: false
headers: {}
responseCodes: {}
tags:
  - Capital Markets
  - Data Migration
  - Financial Technology
  - Migration
  - Rate Limiting
  - Trading
description: >-
  No rate limits are published for Calypso Migration, and there is no public API
  surface for a limit to apply to. Contract discovery on 2026-09-05 found no
  OpenAPI, Swagger, GraphQL, AsyncAPI or MCP endpoint on any host this record
  knows, and no baseURL could be established. Nasdaq Calypso's platform APIs are
  reachable only by licensed institutions through the customer support and
  client ITSM portals, where any throttling contract would also live. An honest
  zero, not an unmeasured one.
limits: []
policies: []
evidence:
  - url: https://www.nasdaq.com/openapi.json
    status: 404
    checked: '2026-09-05'
  - url: https://www.nasdaq.com/products/fintech/calypso/delivery-management-and-services
    status: 200
    checked: '2026-09-05'
maintainers:
  - FN: Kin Lane
    email: kin@apievangelist.com