Flexpa · Rate Limits

Flexpa Rate Limits

Flexpa now publishes an explicit runtime rate-limit signal on the FHIR API - Retry-After plus X-RateLimit-Limit / X-RateLimit-Remaining / X-RateLimit-Reset, with a 429 carrying an OperationOutcome whose issue.code is "throttled". The numeric ceiling behind those headers is not published; commercially, usage is bounded by the annual license caps (eligible users, IAL2 verifications, data retrievals) with per-end-user overage. The public Endpoint Directory MCP server is the one surface with a stated number: 60 requests per minute.

Flexpa Rate Limits is the machine-readable rate-limit profile for Flexpa on the APIs.io network, conforming to the API Commons Rate Limits specification.

It captures 6 rate-limit definitions, measuring requests, users, verifications, and retrievals.

The profile also includes 3 backoff/retry policies defined and response codes documented for throttled, syncing, and syncFailed.

Tagged areas include Healthcare, FHIR, Patient Access, Claims Data, and Health Insurance.

6 Limits Throttle: 429
HealthcareFHIRPatient AccessClaims DataHealth InsuranceRate LimitingQuotasThrottling

Limits

FHIR API request quota token
requests
not published (signalled at runtime by X-RateLimit-* headers)
Exhaustion returns 429 with OperationOutcome issue.code "throttled" and a Retry-After header.
Endpoint Directory MCP server ip
requests
60
Public, unauthenticated server at https://api.flexpa.com/mcp/directory; exceeding returns HTTP 429.
Initial patient sync token
requests
retry until sync completes
FHIR reads/searches return 429 with issue.code "transient" while payer data syncs, typically under one minute.
Eligible users account
users
per license tier (5,000 - unlimited)
Capped by annual platform license tier; overage billed $1-$5 per end user depending on tier.
IAL2 verifications account
verifications
per license tier (1,000 - 625,000)
Included identity-verification volume per annual license.
Data retrievals account
retrievals
per license tier (36,500 - 22,812,500)
Included FHIR data retrievals per annual license.

Policies

Distinguish transient from throttled
Branch on OperationOutcome issue.code before backing off - "transient" means retry in ~3 seconds, "throttled" means honour Retry-After / X-RateLimit-Reset.
Prefer the sync_completed webhook
Subscribe to sync_completed instead of polling the FHIR API through the sync window.
License caps
Usage is bounded by annual platform license caps with per-end-user overage billing.

Sources

Work with this as data

Every rate limit here is available over the APIs.io API and to AI agents over MCP.

MCP server

One button, every client — Claude, Cursor, VS Code and the rest.

https://apis.io/mcp

Tools for rate limits

4 MCP tools reach this
  • find_rate_limitsBrowse and filter every rate limit in the catalog.
  • apis_io_searchSTART HERE — APIs, providers and tags for one query, each with its total.
  • resolveTurn a domain, URL or GitHub org into the provider it belongs to.
  • find_cohortsEvery scored population of providers in the catalog.
All 92 tools →

Call it yourself

curl for this page
This rate limit 
curl "https://apis.io/api/v1/rate-limits/flexpa-rate-limits"
All rate limits 
curl "https://apis.io/api/v1/rate-limits?limit=25"

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