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, conforming to the API Commons Rate Limits specification.

It captures 2 rate-limit definitions, measuring requests_per_hour.

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 Throttle: 429
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.

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

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