Packagist · Rate Limits

Packagist Rate Limits

Packagist does not publish a strict per-key request-per-second rate limit; the project publishes operational guidance for high-volume clients instead. These values are derived from the official API documentation at packagist.org/apidoc.

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

It captures 2 rate-limit definitions.

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 7 backoff/retry policies defined.

Tagged areas include Composer, PHP, Package Registry, Dependency Management, and Open Source.

2 Limits
Method: generated.
Written by API Evangelist and not verified against a page the provider published. Treat every limit as unconfirmed until a dated transcription replaces it.
View Source
ComposerPHPPackage RegistryDependency ManagementOpen SourceDeveloper ToolsSoftware Supply ChainSecurity Advisories

Policies

Maximum 10 concurrent HTTP requests against the Packagist application API.
Maximum 20 concurrent HTTP requests against the static Composer v2 metadata mirror.
Avoid scheduling jobs at the top of the hour (XX:00) or at midnight UTC; these are observed traffic peaks. Spread workloads randomly across the hour.
Send a descriptive User-Agent header including a `mailto=` contact so the Packagist team can reach you about misbehaving clients.
Use HTTP/2-capable clients to take advantage of multiplexing.
Metadata change-log entries are retained for 24 hours. Mirror operators must poll within this window.
Application-level package payloads are cached for 12 hours; prefer /p2/ endpoints for fresher data.

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

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

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