> ## Documentation Index > Fetch the complete documentation index at: https://differentai-fix-signin-code-field-label.mintlify.site/llms.txt > Use this file to discover all available pages before exploring further. # Manually run a tool from an External MCP Connection > Workspace owner/admin diagnostic runner. Executes one named MCP tool with caller-supplied JSON arguments using the Den-managed shared credential or the calling admin's connected credential. Returns an ephemeral inspection of the actual tools/call HTTP request and response with credential and session headers redacted. The caller must already be granted access to the connection. Credentials, arguments, results, and inspection payloads are never written to logs. ## OpenAPI ````yaml /openapi.json post /v1/mcp-connections/{connectionId}/tools/call openapi: 3.1.0 info: title: Den API description: >- OpenAPI spec for the Den control plane API. Authentication: - Use `Authorization: Bearer ` for user-authenticated routes that require a Den session. - Use `x-api-key: ` for organization API-key calls. API keys resolve to the issuing user and the organization member they were scoped to when created, so they can call ordinary user and organization routes without a separate signed-in session. Example: `curl https://api.openworklabs.com/v1/me -H "x-api-key: den_..."`. - Session-only flows still require a signed-in user session, including organization creation, invitation acceptance, active-organization switching, and MCP token minting. - Public routes like health and documentation do not require authentication. Swagger tip: use the security schemes in the Authorize dialog to set either `bearerAuth` or `denApiKey` before trying protected endpoints. version: 0.18.46 contact: name: OpenWork url: https://openworklabs.com email: team@openworklabs.com license: name: OpenWork Enterprise Edition License url: https://github.com/different-ai/openwork/blob/dev/ee/LICENSE servers: - url: https://api.openworklabs.com security: - bearerAuth: [] - denApiKey: [] tags: - name: System description: >- Service health, readiness, API documentation, and desktop version metadata. - name: Authentication description: >- Sign-in discovery, administrator bootstrap, OAuth provider connections, and MCP token minting. - name: OAuth description: >- OAuth 2.0 / OpenID Connect authorization-server and protected-resource metadata and dynamic client registration (RFC 8414, RFC 9728, RFC 7591), used by MCP clients. - name: SCIM description: >- SCIM 2.0 provisioning endpoints for identity providers (RFC 7644) and the organization SCIM connector management routes. - name: SSO description: Organization single sign-on connector management routes. - name: Bootstrap description: Agent-first provisional workspace setup routes. - name: Users description: Current user and membership routes. - name: Organizations description: Organization creation, context, brand assets, and install links. - name: Invitations description: Invitation preview, acceptance, creation, and cancellation routes. - name: Members description: Organization member management routes. - name: Roles description: Organization custom role management routes. - name: Teams description: Organization team management routes. - name: API Keys description: Organization API key management routes. - name: Desktop Policies description: Desktop app policies applied to the organization, members, or teams. - name: LLM Providers description: Organization LLM provider catalog, configuration, and access routes. - name: Inference description: Organization inference settings. - name: Inference Providers description: >- Organization inference Gateway providers, model groups, credential sets, access grants, member connections, and usage. - name: Cloud description: Organization Cloud instance lifecycle and browser gateway resolution. - name: Workers description: Worker lifecycle, billing, and runtime routes. - name: Worker Runtime description: Worker runtime inspection and upgrade routes. - name: Worker Activity description: Worker heartbeat and activity reporting routes. - name: Automations description: Scheduled Automations, their runs, and desktop runner presence. - name: Workflows description: Saved Workflows (Code Mode scripts), their versions, snapshots, and views. - name: Workflow Runs description: Durable Workflow run history. - name: Codemode Runs description: Generated Artifact views produced by Code Mode runs. - name: Apps description: >- Saved reusable apps built from Workflows and Artifact views, and their sharing. - name: Config Objects description: >- Versioned configuration objects (skills, workflows, and other plugin content). - name: Plugins description: Plugin packages, access grants, and imports. - name: Marketplaces description: Marketplaces that distribute plugins to members and teams. - name: Resources description: >- Aggregated snapshot of the resources and marketplace capabilities available to the caller. - name: Dashboards description: Shared dashboards and their access grants. - name: Capability Sources description: >- Native provider capabilities (Google Workspace, Microsoft 365) and external MCP connections executed as the calling member. - name: Direct uploads description: Multipart uploads that stream workspace files straight to a provider. - name: Connectors description: >- Connector accounts and instances (GitHub and other sources) and their sync state. - name: GitHub description: >- GitHub App installation, repository discovery, and plugin import from GitHub. - name: Diagnostics description: Controlled egress diagnostics for self-hosted deployments. - name: Telemetry description: Telemetry event ingestion and adoption analytics. - name: Webhooks description: Signed inbound webhooks from third-party providers. - name: Admin description: Platform administration routes for allowlisted OpenWork administrators. - name: Deprecated description: Removed features that answer with 410 or an empty result for old clients. paths: /v1/mcp-connections/{connectionId}/tools/call: post: tags: - Authentication summary: Manually run a tool from an External MCP Connection description: >- Workspace owner/admin diagnostic runner. Executes one named MCP tool with caller-supplied JSON arguments using the Den-managed shared credential or the calling admin's connected credential. Returns an ephemeral inspection of the actual tools/call HTTP request and response with credential and session headers redacted. The caller must already be granted access to the connection. Credentials, arguments, results, and inspection payloads are never written to logs. operationId: postV1McpConnectionsByConnectionIdToolsCall parameters: - in: path name: connectionId schema: format: typeid type: string minLength: 30 maxLength: 30 required: true description: Den TypeID with 'emc_' prefix and a 26-character base32 suffix. requestBody: required: true content: application/json: schema: $ref: '#/components/schemas/ExternalMcpConnectionToolRunInput' responses: '200': description: The MCP tool completed. content: application/json: schema: $ref: '#/components/schemas/ExternalMcpConnectionToolRunResponse' '400': description: Invalid tool name or arguments. content: application/json: schema: $ref: '#/components/schemas/InvalidRequestError' '401': description: The caller must be signed in. content: application/json: schema: $ref: '#/components/schemas/UnauthorizedError' '403': description: >- The caller must be a workspace owner/admin, have access, and be allowed by tool policy. content: application/json: schema: $ref: >- #/components/schemas/ExternalMcpConnectionToolRunForbiddenError '404': description: Unknown connection. content: application/json: schema: $ref: '#/components/schemas/ExternalMcpConnectionNotFoundError' '409': description: The connection has no usable credential for this member. content: application/json: schema: $ref: '#/components/schemas/ExternalMcpConnectionNotReadyError' '413': description: The tool arguments exceeded the request size limit. content: application/json: schema: $ref: >- #/components/schemas/ExternalMcpConnectionToolRequestTooLargeError '502': description: The upstream MCP tool call failed. content: application/json: schema: $ref: '#/components/schemas/ExternalMcpConnectionToolRunFailedError' security: - bearerAuth: [] - denApiKey: [] components: schemas: ExternalMcpConnectionToolRunInput: type: object properties: toolName: type: string minLength: 1 maxLength: 255 arguments: type: object propertyNames: type: string additionalProperties: {} required: - toolName - arguments ExternalMcpConnectionToolRunResponse: type: object properties: referenceId: type: string durationMs: type: number minimum: 0 result: {} inspection: $ref: '#/components/schemas/ExternalMcpConnectionToolInspection' required: - referenceId - durationMs - result - inspection InvalidRequestError: type: object properties: error: type: string const: invalid_request details: type: array items: type: object properties: message: type: string path: type: array items: anyOf: - type: string - type: number required: - message additionalProperties: {} capability: type: string required: - error - details UnauthorizedError: type: object properties: error: type: string const: unauthorized required: - error ExternalMcpConnectionToolRunForbiddenError: anyOf: - $ref: '#/components/schemas/ForbiddenError' - $ref: '#/components/schemas/ExternalMcpConnectionToolPolicyBlockedError' ExternalMcpConnectionNotFoundError: type: object properties: error: type: string const: connection_not_found message: type: string required: - error - message ExternalMcpConnectionNotReadyError: type: object properties: error: type: string const: connection_not_ready message: type: string required: - error - message ExternalMcpConnectionToolRequestTooLargeError: type: object properties: error: type: string const: payload_too_large message: type: string required: - error - message ExternalMcpConnectionToolRunFailedError: type: object properties: error: type: string const: tool_execution_failed message: type: string diagnostic: $ref: '#/components/schemas/ExternalMcpDiagnostic' inspection: $ref: '#/components/schemas/ExternalMcpConnectionToolInspection' required: - error - message - diagnostic - inspection ExternalMcpConnectionToolInspection: type: object properties: request: $ref: '#/components/schemas/ExternalMcpConnectionToolInspectionRequest' response: $ref: '#/components/schemas/ExternalMcpConnectionToolInspectionResponse' diagnosis: $ref: '#/components/schemas/ExternalMcpConnectionToolInspectionDiagnosis' required: - diagnosis ForbiddenError: type: object properties: error: type: string enum: - forbidden - reauth reason: type: string message: type: string required: - error ExternalMcpConnectionToolPolicyBlockedError: type: object properties: error: type: string const: policy_blocked message: type: string disabledBy: anyOf: - type: string - type: 'null' disabledAt: anyOf: - type: string format: date-time pattern: >- ^(?:(?:\d\d[2468][048]|\d\d[13579][26]|\d\d0[48]|[02468][048]00|[13579][26]00)-02-29|\d{4}-(?:(?:0[13578]|1[02])-(?:0[1-9]|[12]\d|3[01])|(?:0[469]|11)-(?:0[1-9]|[12]\d|30)|(?:02)-(?:0[1-9]|1\d|2[0-8])))T(?:(?:[01]\d|2[0-3]):[0-5]\d(?::[0-5]\d(?:\.\d+)?)?(?:Z))$ - type: 'null' required: - error - message - disabledBy - disabledAt ExternalMcpDiagnostic: type: object properties: referenceId: type: string phase: type: string enum: - CONFIGURATION - NETWORK_DNS - NETWORK_TCP - NETWORK_TLS - HTTP_ROUTING - AUTH_RESOURCE_DISCOVERY - AUTH_ISSUER_DISCOVERY - AUTH_CLIENT_REGISTRATION - AUTH_USER_OR_WORKLOAD - AUTH_TOKEN_ACQUISITION - AUTH_RESOURCE_VALIDATION - MCP_TRANSPORT - MCP_VERSION - MCP_INITIALIZE - MCP_INITIALIZED - MCP_TOOL_DISCOVERY - MCP_TOOL_EXECUTION - PROVIDER_AUTHORIZATION - PROVIDER_EXECUTION - CONTINUITY_REFRESH - CONTINUITY_SESSION - SHUTDOWN category: type: string code: type: string highestPassed: type: string enum: - configured - reachable - authorized - protocol_ready - catalog_ready - operation_ready retryable: type: boolean actionOwner: type: string enum: - openwork - network_admin - provider_admin - organization_admin - member operatorAction: type: string message: type: string httpStatus: type: integer minimum: 100 maximum: 599 operationPhase: type: string enum: - CONFIGURATION - NETWORK_DNS - NETWORK_TCP - NETWORK_TLS - HTTP_ROUTING - AUTH_RESOURCE_DISCOVERY - AUTH_ISSUER_DISCOVERY - AUTH_CLIENT_REGISTRATION - AUTH_USER_OR_WORKLOAD - AUTH_TOKEN_ACQUISITION - AUTH_RESOURCE_VALIDATION - MCP_TRANSPORT - MCP_VERSION - MCP_INITIALIZE - MCP_INITIALIZED - MCP_TOOL_DISCOVERY - MCP_TOOL_EXECUTION - PROVIDER_AUTHORIZATION - PROVIDER_EXECUTION - CONTINUITY_REFRESH - CONTINUITY_SESSION - SHUTDOWN outbound: type: object properties: origin: type: string pathHash: type: string required: - origin - pathHash providerRequestId: type: string providerStatus: type: integer minimum: -9007199254740991 maximum: 9007199254740991 providerCode: type: string payloadBytes: type: integer minimum: -9007199254740991 maximum: 9007199254740991 jsonRpcCode: type: integer minimum: -9007199254740991 maximum: 9007199254740991 connectUrl: type: string format: uri required: - referenceId - phase - category - code - highestPassed - retryable - actionOwner - operatorAction - message ExternalMcpConnectionToolInspectionRequest: type: object properties: method: type: string url: type: string startedAt: type: string format: date-time pattern: >- ^(?:(?:\d\d[2468][048]|\d\d[13579][26]|\d\d0[48]|[02468][048]00|[13579][26]00)-02-29|\d{4}-(?:(?:0[13578]|1[02])-(?:0[1-9]|[12]\d|3[01])|(?:0[469]|11)-(?:0[1-9]|[12]\d|30)|(?:02)-(?:0[1-9]|1\d|2[0-8])))T(?:(?:[01]\d|2[0-3]):[0-5]\d(?::[0-5]\d(?:\.\d+)?)?(?:Z))$ headers: type: array items: $ref: '#/components/schemas/ExternalMcpConnectionToolInspectionHeader' body: $ref: '#/components/schemas/ExternalMcpConnectionToolInspectionBody' required: - method - url - startedAt - headers - body ExternalMcpConnectionToolInspectionResponse: type: object properties: status: type: integer minimum: 100 maximum: 599 statusText: type: string durationMs: type: number minimum: 0 headers: type: array items: $ref: '#/components/schemas/ExternalMcpConnectionToolInspectionHeader' body: $ref: '#/components/schemas/ExternalMcpConnectionToolInspectionBody' required: - status - statusText - durationMs - headers - body ExternalMcpConnectionToolInspectionDiagnosis: type: object properties: status: type: string enum: - succeeded - failed layer: type: string enum: - openwork - network - mcp_connection - remote_http - mcp_tool summary: type: string required: - status - layer - summary ExternalMcpConnectionToolInspectionHeader: type: object properties: name: type: string value: type: string redacted: type: boolean required: - name - value - redacted ExternalMcpConnectionToolInspectionBody: type: object properties: text: type: string bytes: type: integer minimum: 0 maximum: 9007199254740991 truncated: type: boolean unavailable: type: boolean required: - text - bytes - truncated securitySchemes: bearerAuth: type: http scheme: bearer bearerFormat: session-token description: >- Session token passed as `Authorization: Bearer ` for user-authenticated Den routes. denApiKey: type: apiKey in: header name: x-api-key description: >- Organization API key passed as the `x-api-key` header. The raw key is the header value; do not prefix it with `Bearer`. ````