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fix(anthropic): support ANTHROPIC_AUTH_TOKEN as alternative to ANTHROPIC_API_KEY (#853)

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* fix(anthropic): support ANTHROPIC_AUTH_TOKEN as alternative to ANTHROPIC_API_KEY

Anthropic SDK supports two mutually exclusive auth methods: apiKey (sent as
x-api-key header) and authToken (sent as Authorization: Bearer header). Detect
either env var during provider detection and credential validation, and pass
authToken to createAnthropic when only ANTHROPIC_AUTH_TOKEN is set.

* docs(anthropic): document ANTHROPIC_AUTH_TOKEN and refine error message

- Add ANTHROPIC_AUTH_TOKEN to env.example and the en/cn/ja provider docs
- Reword the missing-credential error to "Either ... or ..." for readability

---------

Co-authored-by: duyunjie <duyunjie@zhuanzhuan.com>
Co-authored-by: dayuan.jiang <jdy.toh@gmail.com>
This commit is contained in:
waterystone
2026-06-02 18:26:27 +08:00
committed by GitHub
parent 7b6eb39fa5
commit 277ad83552
5 changed files with 60 additions and 9 deletions
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45
lib/ai-providers.ts
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@@ -573,7 +573,15 @@ function detectProvider(): ProviderName | null {
// Skip ollama - it doesn't require credentials
continue
}
if (process.env[envVar]) {
// Anthropic accepts ANTHROPIC_AUTH_TOKEN (Bearer auth) as alternative to ANTHROPIC_API_KEY
const hasCredential =
provider === "anthropic"
? !!(
process.env.ANTHROPIC_API_KEY ||
process.env.ANTHROPIC_AUTH_TOKEN
)
: !!process.env[envVar]
if (hasCredential) {
// Azure requires additional config (baseURL or resourceName)
if (provider === "azure") {
const hasBaseUrl = !!process.env.AZURE_BASE_URL
@@ -615,13 +623,26 @@ function validateProviderCredentials(
return
}
// Use custom env var name if provided, otherwise use default
const requiredVar = customApiKeyEnv || PROVIDER_ENV_VARS[provider]
if (requiredVar && !process.env[requiredVar]) {
throw new Error(
`${requiredVar} environment variable is required for ${provider} provider. ` +
`Please set it in your .env.local file.`,
// Anthropic accepts ANTHROPIC_AUTH_TOKEN (Bearer auth) as alternative to ANTHROPIC_API_KEY
if (provider === "anthropic" && !customApiKeyEnv) {
const hasCredential = !!(
process.env.ANTHROPIC_API_KEY || process.env.ANTHROPIC_AUTH_TOKEN
)
if (!hasCredential) {
throw new Error(
`Either ANTHROPIC_API_KEY or ANTHROPIC_AUTH_TOKEN environment variable is required for anthropic provider. ` +
`Please set one in your .env.local file.`,
)
}
} else {
// Use custom env var name if provided, otherwise use default
const requiredVar = customApiKeyEnv || PROVIDER_ENV_VARS[provider]
if (requiredVar && !process.env[requiredVar]) {
throw new Error(
`${requiredVar} environment variable is required for ${provider} provider. ` +
`Please set it in your .env.local file.`,
)
}
}
// Azure requires either AZURE_BASE_URL or AZURE_RESOURCE_NAME in addition to API key
@@ -845,8 +866,16 @@ export function getAIModel(overrides?: ClientOverrides): ModelConfig {
serverBaseUrl,
"https://api.anthropic.com/v1",
)
// Anthropic supports two auth methods (mutually exclusive):
// - apiKey: sends as `x-api-key` header
// - authToken: sends as `Authorization: Bearer <token>` header
// Prefer apiKey if present (including client overrides); fall back
// to ANTHROPIC_AUTH_TOKEN env var only when no apiKey is available.
const authToken = !apiKey
? process.env.ANTHROPIC_AUTH_TOKEN
: undefined
const customProvider = createAnthropic({
apiKey,
...(authToken ? { authToken } : { apiKey }),
baseURL,
headers: ANTHROPIC_BETA_HEADERS,
})