{"id":"c331f275c6caeefc","repo":"rust-lang/cargo","slug":"no-credential-providers-could-handle-the-request","errorCode":null,"errorMessage":"no credential providers could handle the request","messagePattern":"no credential providers could handle the request","errorType":"exception","errorClass":"anyhow::Error","httpStatus":null,"severity":"error","filePath":"src/util/auth/mod.rs","lineNumber":572,"sourceCode":"        })?;\n        match provider.perform(&registry, &action, &args[1..]) {\n            Ok(response) => return Ok(response),\n            Err(cargo_credential::Error::UrlNotSupported) => {}\n            Err(cargo_credential::Error::NotFound) => any_not_found = true,\n            e => {\n                return e.with_context(|| {\n                    format!(\n                        \"credential provider `{}` failed action `{action}`\",\n                        args.join(\" \")\n                    )\n                });\n            }\n        }\n    }\n    if any_not_found {\n        Err(cargo_credential::Error::NotFound.into())\n    } else {\n        anyhow::bail!(\"no credential providers could handle the request\")\n    }\n}\n\n/// Returns the token to use for the given registry.\n/// If a `login_url` is provided and a token is not available, the\n/// `login_url` will be included in the returned error.\npub fn auth_token(\n    gctx: &GlobalContext,\n    sid: &SourceId,\n    login_url: Option<&Url>,\n    operation: Operation<'_>,\n    headers: Vec<String>,\n    require_cred_provider_config: bool,\n) -> CargoResult<String> {\n    match auth_token_optional(gctx, sid, operation, headers, require_cred_provider_config)? {\n        Some(token) => Ok(token.expose()),\n        None => Err(AuthorizationError::new(\n            gctx,","sourceCodeStart":554,"sourceCodeEnd":590,"githubUrl":"https://github.com/rust-lang/cargo/blob/0e07a155371a6ce88ae53a2c00df940280c09a67/src/util/auth/mod.rs#L554-L590","documentation":"Cargo iterates every configured credential provider for a registry (token, paseto, libsecret/wincred/keychain, or an external credential-process) and each one either succeeds, fails hard, or returns UrlNotSupported/NotFound. This error fires only when every provider returned UrlNotSupported for the registry URL — i.e. none of them recognized the URL as one they can handle — and none returned NotFound. It means authentication cannot proceed because no provider claims ownership of that registry's URL.","triggerScenarios":"Calling cargo operations that need auth (publish/login/fetch a private registry) where the registry's index URL does not match any configured `credential-process` provider's URL filter, and the built-in providers (cargo:token, cargo:libsecret, etc.) all return UrlNotSupported for that URL.","commonSituations":"A custom/private registry is configured in config.toml under [registry] or [registries] but the `[registry.'my-registry'] global-credential-providers` list does not include a provider that covers that URL; or a credential-process binary that only handles a specific host was removed/renamed; or migrating from cargo:token to a credential-process without updating provider config.","solutions":["Add a credential provider that handles the registry URL: set a token with `cargo login --registry <name>` (uses cargo:token) or configure a `credential-process` in config.toml whose provider accepts that URL.","Verify the registry URL in config.toml matches what the provider expects (scheme, host, path).","Run with `--verbose` to see which providers were tried and that they returned UrlNotSupported.","Check that the provider name in `global-credential-providers` is spelled correctly and that the binary is on PATH."],"exampleFix":"// config.toml before (no provider covers the URL)\n[registries.my-registry]\nindex = \"https://private.example.com/cratesio-index\"\n\n// after\n[registries.my-registry]\nindex = \"https://private.example.com/cratesio-index\"\n[registry.\"my-registry\"]\nglobal-credential-providers = [\"cargo:token\"]\n// then: cargo login --registry my-registry","handlingStrategy":"validation","validationCode":"// Before triggering an authed operation, confirm at least one\n// configured provider plausibly covers the registry URL.\nfn registry_has_provider(gctx: &GlobalContext, sid: &SourceId) -> bool {\n    let providers = cargo::util::auth::credential_provider(gctx, sid, false, true).unwrap_or_default();\n    !providers.is_empty()\n}\n// Then: if !registry_has_provider(&gctx, &sid) { warn user / configure a provider }","typeGuard":null,"tryCatchPattern":"// Match on the anyhow error and surface a configuration hint.\nmatch cargo::ops::publish(...) {\n    Ok(_) => {},\n    Err(e) if e.to_string().contains(\"no credential providers could handle the request\") => {\n        eprintln!(\"configure a credential provider for this registry first\");\n    }\n    Err(e) => return Err(e),\n}","preventionTips":["Always run `cargo login --registry <name>` before publishing to a private registry.","Keep the `global-credential-providers` list in config.toml in sync with your registries.","Use `--verbose` once to confirm which providers cargo tries for each registry."],"tags":["authentication","credentials","registry","network"],"analyzedSha":"0e07a155371a6ce88ae53a2c00df940280c09a67","analyzedAt":"2026-08-06T01:46:58.334Z","schemaVersion":2}