Fidelity National Information Services (FIS) · Rate Limits

Fidelity National Information Rate Limits

FIS does not publish global per-second rate limits in the public Code Connect documentation. Each API and each customer environment has limits specific to the product (core banking, card processing, capital markets) and the contracted volume. Sandbox endpoints have lower throughput than production; production limits are governed by the customer's contract and underlying platform sizing.

Fidelity National Information Rate Limits is the machine-readable rate-limit profile for Fidelity National Information Services (FIS) on the APIs.io network, conforming to the API Commons Rate Limits specification.

It captures 4 rate-limit definitions, measuring varies.

The profile also includes 4 backoff/retry policies defined and response codes documented for throttled, serverError, serviceUnavailable, unauthorized, and forbidden.

Tagged areas include Financial Services, Payments, Banking, Capital Markets, and Wealth Management.

4 Limits Throttle: 429
Financial ServicesPaymentsBankingCapital MarketsWealth ManagementRisk and ComplianceRate Limiting

Limits

Sandbox APIs (Code Connect Developer Portal) developer-account
varies
per-developer test ceiling; not publicly published
Suitable for prototyping only.
Production banking / payments APIs contract
varies
sized to the customer's contracted transaction volume; not publicly published
Capital Markets / Wealth APIs contract
varies
sized to firm volume and platform deployment; not publicly published
Real-time payments (FedNow / RTP via FIS) contract
varies
governed by the underlying clearing rails and customer's certified throughput

Policies

OAuth 2.0 / mTLS
Authenticate with OAuth 2.0 and/or mutual TLS depending on API; rotate credentials before expiry.
Backoff on 429/503
Exponential backoff with jitter on transient errors; honor Retry-After when present.
Idempotency
Use idempotency keys on POST endpoints for payments and transfers to make retries safe.
Customer-environment sizing
Production limits are sized to the customer's underlying platform deployment; raise via FIS service request and capacity review.

Sources