nextauthjs/next-auth · error · Error

Provider with id "${providerId}" not found. Available provid

Error message

Provider with id "${providerId}" not found. Available providers: [${availableProviders}].

What it means

parseProviders looks up the provider whose id matches the requested providerId; if none of the configured providers has that id, it throws with the list of available ids. This guards against requesting signin/callback for a provider that was never configured.

Source

Thrown at packages/core/src/lib/utils/providers.ts:68

        normalized.authorization?.url.searchParams.get("response_mode") ===
        "form_post"
      ) {
        delete normalized.redirectProxyUrl
      }

      // @ts-expect-error Symbols don't get merged by the `merge` function
      // so we need to do it manually.
      normalized[customFetch] ??= userOptions?.[customFetch]
      return normalized
    }

    return merged as InternalProvider
  })

  const provider = providers.find(({ id }) => id === providerId)
  if (providerId && !provider) {
    const availableProviders = providers.map((p) => p.id).join(", ")
    throw new Error(
      `Provider with id "${providerId}" not found. Available providers: [${availableProviders}].`
    )
  }

  return { providers, provider }
}

// TODO: Also add discovery here, if some endpoints/config are missing.
// We should return both a client and authorization server config.
function normalizeOAuth(
  c: OAuthConfig<any> | OAuthUserConfig<any>
): OAuthConfigInternal<any> | object {
  if (c.issuer) c.wellKnown ??= `${c.issuer}/.well-known/openid-configuration`

  const authorization = normalizeEndpoint(c.authorization, c.issuer)
  if (authorization && !authorization.url?.searchParams.has("scope")) {
    authorization.url.searchParams.set("scope", "openid profile email")
  }

View on GitHub (pinned to a1a16a5a77)

Solutions

1. Fix the providerId string to exactly match an id in your providers config array
2. Log or read the "Available providers" list in the error message and use one of those ids
3. Ensure the provider is included in all environments' config (not gated behind a condition)
4. Restart the dev server after editing providers config so changes are picked up

Example fix

// before
providers: [GitHub],
// ... signIn("gitub")
// after
providers: [GitHub],
// ... signIn("github")

const ids = providers.map(p => p.id);
if (!ids.includes(providerId)) throw new Error(`Unknown provider "${providerId}"; configured: ${ids.join(", ")}`);

function isConfiguredProvider(id: string, providers: {id:string}[]): id is string { return providers.some(p => p.id === id); }

try { return await signIn(providerId) } catch (e) { if (String(e.message).match(/Provider with id .* not found/)) { console.error("Available:", e.message); return; } throw e; }

When it happens

Trigger: Calling signIn('gitub') (typo), or hitting /auth/callback/google while only GitHub is configured; provider ids in the providers array not matching the id used in the request.

Common situations: Typos in provider id strings; provider configured only in one environment's config branch; renaming a provider id after URLs/links were hardcoded; case mismatch in the id.

Related errors

• Hasura client error: Please provide an adminSecret
• Hasura client error: Please provide a graphql endpoint
• Must pass `secret` if not set to JWT getToken()
• Unsupported JWT Content Encryption Algorithm
• redirectProxyUrl must be a valid URL. Received: ${provider.r

AI-assisted analysis of nextauthjs/next-auth@a1a16a5a77 (2026-08-28). Data as JSON: /api/errors/75c7b115c3ab7432. Report an issue: GitHub.