Changelog

Unreleased (staged)

Keys accepted in the X-API-Key header and as Authorization: Bearer; ?api_key= unchanged.
Every error body carries error.code / error.message / error.docs_url next to the legacy message.
Per-minute limits are now counted per account (previously clients of a plan could share one counter).
429 responses for the per-minute limit include Retry-After.
OpenAPI 3.1 description published at /openapi.json; this documentation at /developers/; API section in /llms.txt.

Real HTTP statuses for errors (401/403/404/400/405/429/500) after a 30-day notice here and by email to API customers.
Deprecation header on responses to the ?api_key= form (the form itself stays).
Remote MCP server.

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