Source Intelligence
Follow Discord
Sweep 28 Aug 2026 ยท 00:00Z Build v2.1.250 478 read Stable v2.1.236 Latest v2.1.250 Next v2.1.250 Feeds RSS JSON llms.txt

DisclaimerUnofficial, and not affiliated with Anthropic. Nearly all of this is read straight out of what ships: npm bundles, captured prompts, published docs. Anthropic's own notes go in verbatim, marked as theirs. The rest is my reading, and every entry carries the strings behind it. If one looks wrong, vote it down and say why.

One change

errors

api/errors

first seen The page's own history The capture it came from

Nearest release: v2.1.238, published under an hour after this site recorded the change. Shown because the two are within 24 hours of each other. Nothing here says the release caused the edit.

api/errors Changed · +2 / -2 lines

from line 8
 
 The API follows a predictable HTTP error code format:
 
-* 400 - `invalid_request_error`: There was an issue with the format or content of your request. This error type may also be used for other 4XX status codes not listed in this section.
+* 400 - `invalid_request_error`: There was an issue with the format or content of your request. This error type may also be used for other 4XX status codes not listed in this section. The API also returns a 400 when usage reaches an organization or workspace [spend limit you set](https://platform.claude.com/docs/en/api/rate-limits#setting-your-own-spend-limit), except limits on the [Claude Code workspace](https://platform.claude.com/docs/en/manage-claude/workspaces#claude-code-workspace), which can return a 429 instead.
 
 * 401 - `authentication_error`: There's an issue with your API key (for example, it's malformed, revoked, or expired; see [Key expiration](https://platform.claude.com/docs/en/manage-claude/authentication#key-expiration)). On Claude Platform on AWS, this can also indicate a problem with your AWS credentials or SigV4 signature.
from line 22
 
 * 413 - `request_too_large`: Request exceeds the maximum allowed number of bytes. See [Request size limits](https://platform.claude.com/docs/en/api/errors#request-size-limits) for per-endpoint maximums.
 
-* 429 - `rate_limit_error`: Your account has hit a rate limit.
+* 429 - `rate_limit_error`: Your organization has hit a [rate limit](https://platform.claude.com/docs/en/api/rate-limits), reached its usage tier's monthly spend cap, or reached a spend limit on the Claude Code workspace. A tier spend-cap 429 has no `retry-after` header and keeps failing until access resumes; see [Reaching your spend cap](https://platform.claude.com/docs/en/api/rate-limits#reaching-your-spend-cap) for how to recognize it.
 
 * 500 - `api_error`: An unexpected error has occurred internal to Anthropic's systems. Retry the request with exponential backoff; if the error persists, contact support with the [request ID](https://platform.claude.com/docs/en/api/errors#request-id).