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, in the API Commons Rate Limits shape.

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

Limit state is signalled in the Retry-After, X-RateLimit-Limit, X-RateLimit-Remaining, and X-RateLimit-Reset response headers, and an exhausted limit returns HTTP 429.

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 Exhausted: HTTP 429 Retry-AfterX-RateLimit-LimitX-RateLimit-RemainingX-RateLimit-Reset
Transcribed from the provider's documentation on 2026-08-14 — www.flexpa.com/docs/records.
View Source
HealthcareFHIRPatient AccessClaims DataHealth InsuranceRate LimitingQuotasThrottling

Limits

FHIR API request quota token
requests · per not published
not published (signalled at runtime by X-RateLimit-* headers)/not published
Exhaustion returns 429 with OperationOutcome issue.code "throttled" and a Retry-After header.
Endpoint Directory MCP server ip
requests · per minute
60/minute
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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