> ## Documentation Index > Fetch the complete documentation index at: https://docs.goosybear.ai/llms.txt > Use this file to discover all available pages before exploring further. # Call connections.probe_connector_address > Check how a member's own MCP server or API address wants to sign in, before they set it up — 'check this API address before I add it', 'does this connector need a token'. Ask a member's own MCP server or API address how it signs in, BEFORE they set it up. Use it when the operator says they want to bring their own connector and gives you an address: it dials the address once, reads nothing but the way it refuses, and reports whether it wants a token, a sign-in with the provider, or nothing at all. It writes no row, stores no credential and registers nothing — finishing the setup is the operator's own act in Connections → Add custom connector, because the token they may need to paste is a value no tool may ever carry. Not for refreshing a connector already set up — that is `connections.resync_custom_connector`. Every result names the workspace it ran in. Say which workspace the answer is about. When the account has more than one workspace and none is selected, this tool refuses with `workspace_ambiguous` and lists the choices — offer them, never pick one. ## OpenAPI ````yaml /openapi.json post /api/v1/tools/connections.probe_connector_address openapi: 3.1.0 info: title: Goosy Bear API version: 1.0.0-beta summary: Manage workspace content, projects, Data tables, Pages, library and credits. description: >- BETA. This API is in beta: paths, request shapes and response envelopes may change, and every response carries an `x-goosy-api: beta` header for as long as that is true. A change is additive, or it is deprecated first: a response to a call that uses a deprecated feature carries `Deprecation` and `Sunset` headers, and nothing is removed until at least 90 days after its deprecation. Pin the OpenAPI document you generated against and re-generate when it changes. servers: - url: https://app.goosybear.ai description: Production security: - tenantApiKey: [] paths: /api/v1/tools/connections.probe_connector_address: post: tags: - connections summary: Call connections.probe_connector_address description: >- Check how a member's own MCP server or API address wants to sign in, before they set it up — 'check this API address before I add it', 'does this connector need a token'. Ask a member's own MCP server or API address how it signs in, BEFORE they set it up. Use it when the operator says they want to bring their own connector and gives you an address: it dials the address once, reads nothing but the way it refuses, and reports whether it wants a token, a sign-in with the provider, or nothing at all. It writes no row, stores no credential and registers nothing — finishing the setup is the operator's own act in Connections → Add custom connector, because the token they may need to paste is a value no tool may ever carry. Not for refreshing a connector already set up — that is `connections.resync_custom_connector`. Every result names the workspace it ran in. Say which workspace the answer is about. When the account has more than one workspace and none is selected, this tool refuses with `workspace_ambiguous` and lists the choices — offer them, never pick one. operationId: call_connections_probe_connector_address parameters: - name: x-request-id in: header required: false description: >- Your own id for this request, echoed back and recorded on the audit trail. 1–128 characters from `A–Z a–z 0–9 . _ : -`, starting with a letter or digit; anything else is replaced by a generated id. schema: type: string maxLength: 128 requestBody: required: true content: application/json: schema: type: object properties: kind: type: string enum: - mcp - openapi description: >- `mcp` for a remote MCP server, `openapi` for a REST API described by an OpenAPI document. Ask the operator which they have rather than guessing from the address. address: type: string description: >- The address to ask, exactly as the operator gave it: the MCP server's own https URL for `mcp`, or the https URL of the OpenAPI document for `openapi`. It is judged by the same SSRF floor the real dial takes, so a private or non-https address refuses here rather than being probed. workspace: type: string minLength: 1 description: >- Which workspace to run in — its slug. Omit to use your default. With more than one reachable workspace and no default, the call is refused and the choices are listed. required: - kind - address additionalProperties: false responses: '200': description: >- The call was admitted and dispatched. `ok` says whether the tool succeeded — a refusal the tool itself produced is still a 200, exactly as it is a successful JSON-RPC result over MCP. headers: x-goosy-api: description: Present while this API is in beta; the value is `beta`. schema: type: string const: beta x-request-id: description: >- This request's id: the `x-request-id` you sent when it was well formed, otherwise one generated for you. Quote it to support; it is recorded on every audit row the call wrote. schema: type: string RateLimit-Limit: description: Requests this key may make in a rolling minute. schema: type: integer minimum: 1 RateLimit-Remaining: description: Requests left in the current rolling minute. schema: type: integer minimum: 0 RateLimit-Reset: description: Whole seconds until the window frees more requests. schema: type: integer minimum: 1 x-goosy-tool-error: description: >- `true` when a boundary step refused the call — workspace resolution failed or could not be read. A tool that ran and returned its own typed `ok: false` reports `false` here. **Branch on `ok` in the body for the outcome; this header is the transport-level hint.** schema: type: string enum: - 'true' - 'false' content: application/json: schema: oneOf: - type: object description: The tool ran and answered. properties: ok: type: boolean const: true auth_mode: type: string enum: - oauth - bearer - none description: >- `oauth` — the address wants the operator to sign in with the provider; there is nothing to paste. `bearer` — it wants a token the operator holds. `none` — it answered without asking for anything. It is a DEFAULT for the Add custom connector sheet, never a boundary: the operator can override it under Advanced, and the registration re-validates whatever it is actually given. evidence: type: string description: >- How the answer was reached, in the rail's own vocabulary (for example `oauth_challenge`, `credential_challenge`, `document_key_scheme`, `reachable`). Never an address and never a credential. Quote it only if the operator asks why. oauth_endpoints_known: type: - boolean - 'null' description: >- For an API only: whether the rail already knows where the provider's sign-in lives. `false` means the operator will be asked for the authorize and token URLs during setup — say so before they start. `null` for an MCP server, whose endpoints come from its own discovery. workspace: type: string description: The slug of the workspace this call ran in. working_in: type: object properties: label: type: string description: 'The chip words — e.g. "working in: Acme Main".' note: type: string description: >- Why this workspace — e.g. "your default", "this call only". workspace: type: string description: The resolved workspace's slug. source: type: string enum: - call-override - key-pin - stored-default - sole-reachable description: >- Which rung of the R7 precedence resolved the workspace. required: - label - note - workspace - source additionalProperties: false description: >- Which workspace this call ran in, and how that was decided. Present on every workspace-scoped result. required: - ok - auth_mode - evidence - oauth_endpoints_known - working_in - workspace - $ref: '#/components/schemas/ToolRefusal' '400': description: >- The request could not be used: the body is present but not a JSON object (`tenant_api.malformed_body`); it is a top-level array carrying more messages than this endpoint accepts (`tenant_mcp.batch_too_large`); or the `Idempotency-Key` header is malformed (`tenant_api.idempotency_key_invalid`), disagrees with the body's `idempotency_key` (`tenant_api.idempotency_key_conflict`), or was sent to an action that cannot replay a retry (`tenant_api.idempotency_unsupported`). Nothing ran. headers: x-goosy-api: description: Present while this API is in beta; the value is `beta`. schema: type: string const: beta x-request-id: description: >- This request's id: the `x-request-id` you sent when it was well formed, otherwise one generated for you. Quote it to support; it is recorded on every audit row the call wrote. schema: type: string Deprecation: description: >- RFC 9745: this refusal's nested `error` object is deprecated, since this instant (`@`). schema: type: string Sunset: description: >- RFC 8594: the nested `error` object may be removed after this date (2026-12-31). schema: type: string Link: description: The page that says what to read instead (`rel="deprecation"`). schema: type: string RateLimit-Limit: description: Requests this key may make in a rolling minute. schema: type: integer minimum: 1 RateLimit-Remaining: description: Requests left in the current rolling minute. schema: type: integer minimum: 0 RateLimit-Reset: description: Whole seconds until the window frees more requests. schema: type: integer minimum: 1 content: application/json: schema: $ref: '#/components/schemas/Error' '401': description: >- No bearer credential, or one that did not resolve. Deliberately ONE undifferentiated answer for absent / unknown / revoked / expired, so the endpoint is never an oracle over the key space. headers: x-goosy-api: description: Present while this API is in beta; the value is `beta`. schema: type: string const: beta x-request-id: description: >- This request's id: the `x-request-id` you sent when it was well formed, otherwise one generated for you. Quote it to support; it is recorded on every audit row the call wrote. schema: type: string Deprecation: description: >- RFC 9745: this refusal's nested `error` object is deprecated, since this instant (`@`). schema: type: string Sunset: description: >- RFC 8594: the nested `error` object may be removed after this date (2026-12-31). schema: type: string Link: description: The page that says what to read instead (`rel="deprecation"`). schema: type: string content: application/json: schema: $ref: '#/components/schemas/Error' '403': description: >- The credential is good but the surface is not open to it — the platform or account API switch is off, or the holder lacks the `api.access` capability. The `code` says which. headers: x-goosy-api: description: Present while this API is in beta; the value is `beta`. schema: type: string const: beta x-request-id: description: >- This request's id: the `x-request-id` you sent when it was well formed, otherwise one generated for you. Quote it to support; it is recorded on every audit row the call wrote. schema: type: string Deprecation: description: >- RFC 9745: this refusal's nested `error` object is deprecated, since this instant (`@`). schema: type: string Sunset: description: >- RFC 8594: the nested `error` object may be removed after this date (2026-12-31). schema: type: string Link: description: The page that says what to read instead (`rel="deprecation"`). schema: type: string content: application/json: schema: $ref: '#/components/schemas/Error' '404': description: >- No such tool. The body names no tool and is identical for every unrecognised name. headers: x-goosy-api: description: Present while this API is in beta; the value is `beta`. schema: type: string const: beta x-request-id: description: >- This request's id: the `x-request-id` you sent when it was well formed, otherwise one generated for you. Quote it to support; it is recorded on every audit row the call wrote. schema: type: string Deprecation: description: >- RFC 9745: this refusal's nested `error` object is deprecated, since this instant (`@`). schema: type: string Sunset: description: >- RFC 8594: the nested `error` object may be removed after this date (2026-12-31). schema: type: string Link: description: The page that says what to read instead (`rel="deprecation"`). schema: type: string RateLimit-Limit: description: Requests this key may make in a rolling minute. schema: type: integer minimum: 1 RateLimit-Remaining: description: Requests left in the current rolling minute. schema: type: integer minimum: 0 RateLimit-Reset: description: Whole seconds until the window frees more requests. schema: type: integer minimum: 1 content: application/json: schema: $ref: '#/components/schemas/Error' '429': description: >- Over this key's per-minute cap. Carries `Retry-After` and `error.retry_after_seconds`. headers: x-goosy-api: description: Present while this API is in beta; the value is `beta`. schema: type: string const: beta x-request-id: description: >- This request's id: the `x-request-id` you sent when it was well formed, otherwise one generated for you. Quote it to support; it is recorded on every audit row the call wrote. schema: type: string Deprecation: description: >- RFC 9745: this refusal's nested `error` object is deprecated, since this instant (`@`). schema: type: string Sunset: description: >- RFC 8594: the nested `error` object may be removed after this date (2026-12-31). schema: type: string Link: description: The page that says what to read instead (`rel="deprecation"`). schema: type: string RateLimit-Limit: description: Requests this key may make in a rolling minute. schema: type: integer minimum: 1 RateLimit-Remaining: description: Requests left in the current rolling minute. schema: type: integer minimum: 0 RateLimit-Reset: description: Whole seconds until the window frees more requests. schema: type: integer minimum: 1 Retry-After: description: Whole seconds to wait before retrying. schema: type: integer minimum: 1 content: application/json: schema: $ref: '#/components/schemas/Error' components: schemas: ToolRefusal: type: object properties: ok: type: boolean const: false code: type: string description: >- The typed reason — e.g. `workspace_ambiguous`, `invalid_arguments`, or the tool's own failure code. message: type: string description: A sentence a person can act on. workspaces: type: array items: type: string description: 'On a workspace refusal: the slugs this key may pass as `workspace`.' issues: type: array items: type: object properties: path: type: string message: type: string required: - path - message additionalProperties: false description: 'On `invalid_arguments`: which fields failed, and why.' required: - ok - code - message additionalProperties: false description: A call that was admitted and dispatched, and did not succeed. Error: type: object properties: ok: type: boolean const: false code: type: string description: >- The typed refusal code — e.g. `tenant_mcp.surface_disabled`, `tenant_mcp.rate_limited`. message: type: string description: A sentence a person can act on. retry_after_seconds: type: number description: 'On a 429: whole seconds to wait. Mirrors `Retry-After`.' error: type: object properties: code: type: string message: type: string retry_after_seconds: type: number required: - code - message additionalProperties: false description: >- Deprecated: the same values as the top-level fields, kept until 2026-12-31. Read `code` and `message` at the top level. required: - ok - code - message - error additionalProperties: false description: >- A request the boundary refused before dispatching anything. The same shape the MCP endpoint answers its own refusals with, and the same top-level fields a dispatched call's refusal carries, so one client branch covers both. securitySchemes: tenantApiKey: type: http scheme: bearer description: >- An API key minted at Settings › API & MCP. Send it as `Authorization: Bearer `. A key carries its holder's own permissions, resolved on every call — revoking a membership closes the key's reach immediately. Keep it in an environment variable (`GOOSY_API_KEY`), never in a committed file. ````