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fix(ai): Anthropic Messages default endpoint rendered /v1/v1/messages (claude-code 404) #1813

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Merged
dezren39 merged 1 commit into from
Nov 6, 2026
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fix(ai): Anthropic Messages default endpoint rendered /v1/v1/messages (claude-code 404) #1813

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12 changes: 10 additions & 2 deletions packages/ai/src/protocols/anthropic-messages.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -34,8 +34,16 @@ import { Lifecycle } from "./utils/lifecycle.js"
import { ToolStream } from "./utils/tool-stream.js"

const ADAPTER = "anthropic-messages"
export const DEFAULT_BASE_URL = "https://api.anthropic.com/v1"
export const PATH = "/messages"
// The protocol's endpoint render appends PATH ("/messages") to this
// base, so the base is the API origin only - "https://api.anthropic.com/v1"
// here produced https://api.anthropic.com/v1/v1/messages at runtime
// (Anthropic 404), which broke every AnthropicMessages consumer that
// relied on the default (notably the claude-code provider, #6117).
export const DEFAULT_BASE_URL = "https://api.anthropic.com"
// NOTE: the path carries the /v1 prefix - Endpoint.render concatenates
// baseURL + path with no de-duplication, and DEFAULT_BASE_URL above is
// the bare origin, so the version segment lives here exactly once.
export const PATH = "/v1/messages"
export const DEFAULT_MAX_TOKENS = 32_000
const MIN_THINKING_BUDGET = 1_024
const DEFAULT_EFFORT = "high"
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23 changes: 13 additions & 10 deletions packages/ai/src/providers/claude-code.ts
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Expand Up @@ -20,17 +20,20 @@
// the coordinator repoints the config block at this package; nothing
// here re-enables it.
//
// Live-verification status (2026-11-05): two probes in this provider's
// exact shape (identity block first, claude-code/oauth betas, CLI
// headers; one with the CLI's billing-header system block, models
// claude-haiku-5-5 and claude-haiku-4-5) reached api.anthropic.com and
// were refused 403 oauth_not_allowed_for_organization — the same
// Live-verification status (2026-11-06): the org-level OAuth denial
// below is RESOLVED - Drew enabled Claude Max on the account and the
// provider's exact wire shape (identity block, claude-code/oauth
// betas, CLI headers, OAuth bearer) now returns 200 from
// api.anthropic.com for both the fleet model ids (claude-haiku-5-5,
// claude-sonnet-5-5) and catalog ids. The 2026-11-05 status was:
// two probes in this provider's exact shape reached api.anthropic.com
// and were refused 403 oauth_not_allowed_for_organization - the same
// org-level OAuth denial bin/claude-code-proxy.mjs documented for
// GET /v1/models on 2026-10-28. The wire route and auth shape are the
// CLI's real ones; what is missing is an account whose organization
// allows OAuth API access, which is Drew's interactive sign-in
// (code#6117, Drew-gated). Until then this provider surfaces that 403
// as a loud provider error — it never falls back to the CLI.
// GET /v1/models on 2026-10-28. Separately, the deployed binary's
// requests 404ed until the AnthropicMessages DEFAULT_BASE_URL fix
// (bare origin; the endpoint render appends "/messages", and the
// old "/v1"-suffixed base produced /v1/v1/messages).

import type { ProviderPackage } from "../provider-package.js"
import { AnthropicMessages } from "../protocols/anthropic-messages.js"
import { ClaudeCodeMessages } from "../protocols/claude-code-messages.js"
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