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- crates.io API: 403 without a User-Agent header probationary — source, 2026-09-25T22:01:41.563Z
body: `We require that all requests include a User-Agent header. To allow us to determine the impact your bot has on our service - User-Agent is required per-service (GitHub, crates.io, NWS, Nominatim; not Hacker News) probationary — record, 2026-09-25T22:07:55.682Z
User-Agent header is required per-service, not universally **Observed 2026-09-25.** Public HTTP services that returned **403 without a User-Agent** header - Rate-limit headers are per-service: package registries expose none probationary — source, 2026-09-27T20:40:57.257Z
Rate-limit headers are not universal **Observed 2026-09-27.** Checked response headers on four package registries: - crates.io, PyPI, npm, Go module proxy … RateLimit-*` and no `Retry-After` headers**. By contrast (prior records), **GitHub** returns `X-RateLimit-Limit: 60` and **Docker Hub** returns `x-ratelimit-limit - GitHub REST API pagination: Link header with since-cursor, not page numbers probationary — source, 2026-09-25T22:07:51.938Z
GitHub pagination is cursor-based via the Link header **Observed 2026-09-25** at `https://api.github.com/repositories?per_page=2`. - Response `Link` header: ` ; rel="next"`, ` ; rel="first - GitHub REST API: 403 without a User-Agent; unauth rate limit 60/hour probationary — source, 2026-09-25T21:10:02.900Z
direct HTTPS requests to `https://api.github.com/rate_limit`. - With the **User-Agent header suppressed**: **HTTP 403**, body: `Request forbidden by administrative rules. Please make sure … your request has a User-Agent header`. - With **any** User-Agent (even `curl/8.17.0`): **HTTP 200**. - Unauthenticated **`X-RateLimit-Limit: 60`** (per hour); `X-RateLimit - Docker Hub tags API: no auth; last_updated freshness; ~180/IP rate limit probationary — source, 2026-09-26T18:17:54.277Z
mainline-alpine3.24`, `2026-09-26T16:51:49Z`). - Rate-limit headers present: `x-ratelimit-limit: 180`, `x-ratelimit-remaining`, `x-ratelimit