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Anthropic · Developer API

Is Anthropic API down right now?

The Anthropic API, also called the Claude API, gives developers programmatic access to Claude models through api.anthropic.com. Keys, billing and workspaces are managed in the Claude Console.

Live status · Anthropic API

Checking live status…

Reading the official status page, our reachability checks and recent user reports.

Official status page
—status.claude.com
Our reachability check
—Checked every minute from our server
User reports
—From visitors to this page

Having trouble with Anthropic API?

Tell us what’s wrong. One report per person every 30 minutes; nothing else is collected.

Anthropic API in the last 24 hours

Loading the last 24 hours…

Reachability (our checks)No data
  • Reachable
  • Partly reachable
  • Not reachable
  • No data
Response timeNo data
User reportsNo data

If Anthropic API isn’t working for you

When the live checks above look normal, the problem is usually on your side or limited to one feature. These are the fixes that help most often with Anthropic API:

  1. 529 overloaded_error

    A 529 means the API is temporarily overloaded because of high traffic across all users — it is not tied to your account. Retry with exponential backoff and check the Claude API (api.anthropic.com) component on the status page.

  2. 429 rate_limit_error

    A 429 means your organization hit a rate limit. A sudden jump in traffic can also trigger it, so ramp traffic up gradually and honour the retry-after header.

  3. 500 api_error and 504 timeout_error

    A 500 is an unexpected error inside Anthropic’s systems — retry with backoff, and contact support with the request ID if it keeps happening. For 504 timeouts on long generations, use streaming or the Message Batches API.

  4. Account errors aren’t outages

    401 authentication_error (bad or revoked key), 402 billing_error, 403 permission_error and 400 invalid_request_error are about your key, billing or request. Fix these in the Claude Console rather than retrying.

  5. Use SDK retries and log request IDs

    The official SDKs automatically retry connection errors, 429s and 5xx errors with exponential backoff. Every response carries a request-id header; log it so support can trace failed calls.

  6. Errors in the middle of a stream

    When streaming, an error can arrive after the API has already returned 200, as an error event in the stream. Handle those events separately from HTTP status codes.

Official Anthropic API sources

Questions about Anthropic API outages

What’s the difference between a 429 and a 529 from the Anthropic API?

A 429 rate_limit_error is specific to your organization: you hit a rate limit. A 529 overloaded_error means the API is under high load for everyone. Both can be retried with backoff.

Is the Anthropic API down or is it my integration?

Look at the error type and at the Claude API (api.anthropic.com) component on status.claude.com. Widespread 500 or 529 errors plus a status incident point to an outage, while 4xx errors usually point to your key, billing or request. This page combines the official status page, our own reachability checks every minute and user reports.

Does status.claude.com cover the API separately from claude.ai?

Yes. Claude API, Claude Console and claude.ai are separate components, so the consumer app can have problems while the API works, and the other way round.

Where did status.anthropic.com go?

status.anthropic.com now redirects to status.claude.com, Anthropic’s official status page for both the Claude apps and the API.

How this page decides

The answer at the top combines three signals: what Anthropic reports on its official status page, our own check that Anthropic API is reachable (every minute, with response time), and reports from people on this page. Problems are flagged when the official source reports an incident, our checks start failing, or reports rise well above the usual level for Anthropic API. It’s an independent page — not affiliated with Anthropic. See all AI services.

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