Stellar · Rate Limits

Stellar Rate Limits

The SDF-hosted Horizon instance (horizon.stellar.org) enforces per-IP rate limits on all REST endpoints. The default ceiling is 3,600 requests per hour per IP address (effectively 1 request/second averaged). The X-RateLimit-Limit, X-RateLimit-Remaining, and X-RateLimit-Reset headers are returned on every response. Operators self-hosting Horizon may configure custom limits. Streaming SSE connections count against the same bucket. Transaction submission (POST /transactions) is subject to the same IP-based limit.

Stellar Rate Limits is the machine-readable rate-limit profile for Stellar on the APIs.io network, in the API Commons Rate Limits shape.

It captures 2 rate-limit definitions, measuring requests_per_hour.

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

This profile was written by API Evangelist and has not been verified against a page the provider published; treat every limit as unconfirmed until a dated transcription replaces it.

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

Tagged areas include Rate Limiting, Blockchain, Horizon, and Stellar.

2 Limits Exhausted: HTTP 429 X-RateLimit-LimitX-RateLimit-RemainingX-RateLimit-Reset
Method: generated, dated 2026-06-14.
Written by API Evangelist on 2026-06-14 and not verified against a page the provider published. Treat every limit as unconfirmed until a dated transcription replaces it.
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Rate LimitingBlockchainHorizonStellar

Limits

Horizon REST — all endpoints (SDF public instance) IP
requests_per_hour · hour
3600
Equivalent to ~1 request/second averaged over an hour. Applies to all GET and POST endpoints on the SDF-hosted horizon.stellar.org. Self-hosted Horizon operators may set higher limits.
Horizon REST — testnet (SDF public instance) IP
requests_per_hour · hour
3600
Same ceiling applies to horizon-testnet.stellar.org.

Policies

Backoff
Honor 429 responses with exponential backoff before retrying.
Self-hosting
Teams requiring higher throughput should run their own Horizon instance; no published paid tier exists for elevated SDF-hosted limits.
Streaming connections
SSE streaming connections share the same IP rate limit bucket as REST requests.

Sources

Work with this as data

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

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Tools for rate limits

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curl "https://apis.io/api/v1/rate-limits?limit=25"

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