> ## Documentation Index > Fetch the complete documentation index at: https://docs.mcpjam.com/llms.txt > Use this file to discover all available pages before exploring further. # Create a journey > Creates one journey: a persona pursuing a `goal` against one or more environments. To draft several with a model first, use `POST /projects/{projectId}/journeys/generate` — that route persists nothing. `personaId` and `swarmId` must belong to THIS project. Naming one from another project is a `404`, not a silent cross-project reference. Creating a journey does not run it. Launch it with `POST /projects/{projectId}/journeys/{journeyId}/runs`. ## OpenAPI ````yaml /reference/openapi.json post /projects/{projectId}/journeys openapi: 3.1.0 info: title: MCPJam API version: 1.0.0-preview description: >- Programmatic access to MCP servers saved in your MCPJam projects — live diagnostics (validate, inspect, export) and operations: call tools, render prompts, run eval suites asynchronously and poll their results, and import OAuth tokens. **The API is in preview**: the surface may change while we finish the design. Error `code` values are stable; error `message` strings are not. Write clients that ignore unknown response fields. contact: name: MCPJam url: https://github.com/MCPJam/inspector/issues servers: - url: https://app.mcpjam.com/api/v1 description: Hosted MCPJam security: - bearerAuth: [] tags: - name: Hosts description: >- Project hosts: named model + capability profiles you run chats and eval suites against. - name: Environments description: >- Project environments: named, live-editable execution bundles (one host, an optional standalone server group, optionally pinned skills and plugin versions) that eval suites and journeys run against. Distinct from Sandbox images, which are Computer base images. Reads require project membership; every write requires project admin. - name: Plugins description: >- Agent Plugins imported into a project — read-only inventory and version detail. - name: Sandbox images description: >- Custom Computer images: a digest-pinned Dockerfile built into an immutable image your project's computers boot from. - name: Server diagnostics description: Connect-level health checks against a saved MCP server. - name: Primitives description: 'The server''s MCP primitives: tools, prompts, and resources.' - name: Export description: Full-server snapshots for diffing and CI. - name: Execution description: 'Run the server''s primitives: call tools, render prompts.' - name: Eval runs description: >- Asynchronous eval suite runs: create with 202, poll status, iterations, and traces. - name: Server connections description: >- Connect an MCP server URL to a project, authorizing in a browser when the server requires it. - name: OAuth description: 'Bring-your-own OAuth: import externally obtained tokens for a server.' - name: Chatboxes description: >- Read-only access to the chatboxes published from a project: listing, settings, attached servers, and share links. - name: Catalog description: >- Discover the resources the other routes operate on: your account, projects, servers, eval suites, and chat sessions. - name: Tunnels description: >- Relay tunnels that expose local MCP servers through a public URL, registered as first-class project servers (the `mcpjam tunnel` CLI flow). - name: Agent description: >- Headless agent turns over the public API: send a message history, the server runs one assistant turn with project-scoped workspace tools (eval reads + suite creation) on a pinned hosted model, and returns the reply plus created-resource references. - name: Swarms description: >- Personas, journeys and swarm containers — the authoring half of Swarms — plus the model-backed generation that drafts them. - name: Swarm runs description: >- Launching journeys and reading what they produced. Launching SPENDS — see the per-operation notes. - name: Swarm insights description: >- What a swarm run revealed. The scorecard and findings are deterministic and free; requesting wave insights runs models and draws on your shared daily ledger. - name: User testing description: >- Publishing an environment for real visitors, and controlling who can reach it. Several of these NARROW access and take effect immediately. paths: /projects/{projectId}/journeys: parameters: - $ref: '#/components/parameters/projectId' post: tags: - Swarms summary: Create a journey description: >- Creates one journey: a persona pursuing a `goal` against one or more environments. To draft several with a model first, use `POST /projects/{projectId}/journeys/generate` — that route persists nothing. `personaId` and `swarmId` must belong to THIS project. Naming one from another project is a `404`, not a silent cross-project reference. Creating a journey does not run it. Launch it with `POST /projects/{projectId}/journeys/{journeyId}/runs`. operationId: createJourney parameters: - name: Idempotency-Key in: header required: false description: >- Retry-safe create key. Replaying the SAME key with the SAME body returns the original resource instead of creating a second one; reusing it with a DIFFERENT body is a 409. schema: type: string requestBody: required: true description: The journey to create. content: application/json: schema: $ref: '#/components/schemas/JourneyCreateRequest' responses: '201': description: The created journey. content: application/json: schema: $ref: '#/components/schemas/Journey' '400': $ref: '#/components/responses/ValidationError' '401': $ref: '#/components/responses/Unauthorized' '403': $ref: '#/components/responses/Forbidden' '404': $ref: '#/components/responses/NotFound' '409': $ref: '#/components/responses/Conflict' '429': $ref: '#/components/responses/RateLimited' '500': $ref: '#/components/responses/InternalError' components: parameters: projectId: name: projectId in: path required: true description: ID of the hosted project that contains the server. schema: type: string schemas: JourneyCreateRequest: type: object required: - goal - personaId - sessionsPerTarget - maxTurns additionalProperties: false properties: name: type: string maxLength: 200 goal: type: string maxLength: 4000 description: 1–4000 characters. personaId: type: string description: An existing persona in this project. swarmId: type: string description: Authoring provenance only — which swarm container this was made in. environmentIds: type: array items: type: string minItems: 1 description: >- The environments to fan out across. NON-EMPTY when present: `[]` reads as "these, naming none", and would silently fall back to something else. serverAttachmentId: type: string description: Legacy host-pinned grounding. hostIds: type: array items: type: string sessionsPerTarget: type: integer minimum: 1 maximum: 100 maxTurns: type: integer minimum: 1 maximum: 200 Journey: type: object description: >- A persona's task: what they are trying to accomplish, and across which targets. Launching one is `POST /projects/{projectId}/journeys/{journeyId}/runs`. required: - id - projectId - name - goal - personaId - swarmId - environmentIds - sessionsPerTarget - maxTurns - createdAt - updatedAt properties: id: type: string projectId: type: string name: type: string goal: type: string description: What the persona is trying to accomplish. This drives the whole run. personaId: type: string swarmId: type: - string - 'null' description: >- The swarm container this journey was authored under. Provenance only — nothing resolves through it at run time, and a journey created outside a swarm has none. environmentIds: type: array items: type: string description: >- Environments this journey fans out across. EMPTY on a host-pinned journey — that is a different execution model, not a journey with no targets. serverAttachmentId: type: string description: >- Legacy host-pinned grounding. Absent on an environment-based journey. sessionsPerTarget: type: - integer - 'null' description: Sessions run against EACH target. Total sessions = targets × this. maxTurns: type: - integer - 'null' createdAt: type: number description: Epoch milliseconds. updatedAt: type: number description: Epoch milliseconds. Error: type: object required: - code - message properties: code: type: string description: >- Stable, machine-readable error code. New codes may be added over time; treat unknown codes as non-retryable failures unless the HTTP status says otherwise. enum: - UNAUTHORIZED - FORBIDDEN - NOT_FOUND - CONFLICT - VALIDATION_ERROR - RATE_LIMITED - FEATURE_NOT_SUPPORTED - SERVER_UNREACHABLE - TIMEOUT - OAUTH_REQUIRED - INTERNAL_ERROR message: type: string description: >- Human-readable description. May change between releases — don't match on it. details: type: object description: Optional, unstructured context bag. additionalProperties: true responses: ValidationError: description: Malformed body or parameters. content: application/json: schema: $ref: '#/components/schemas/Error' example: code: VALIDATION_ERROR message: Invalid JSON body Unauthorized: description: >- Missing, invalid, revoked, or orphaned key (`UNAUTHORIZED`) — or the **target MCP server** needs an OAuth grant (`OAUTH_REQUIRED`), which is a property of the server, not your key. content: application/json: schema: $ref: '#/components/schemas/Error' examples: badKey: summary: Invalid or revoked key value: code: UNAUTHORIZED message: Invalid API key oauthRequired: summary: Target server needs an OAuth grant value: code: OAUTH_REQUIRED message: Server requires OAuth authorization Forbidden: description: Key is valid but not allowed to do this. content: application/json: schema: $ref: '#/components/schemas/Error' example: code: FORBIDDEN message: You do not have access to this project NotFound: description: Unknown project, server, or resource. content: application/json: schema: $ref: '#/components/schemas/Error' example: code: NOT_FOUND message: Server not found Conflict: description: >- The resource is not in a state that accepts this write — a stale `expectedRevision`, a duplicate name, or an environment that cannot currently be launched. The request was well-formed; re-read the resource and retry. content: application/json: schema: $ref: '#/components/schemas/Error' example: code: CONFLICT message: >- Environment changed since you loaded it (expected revision 3, current 5). Reload and retry. RateLimited: description: >- Per-key rate limit exceeded (60 requests/minute sustained, bursts up to 10). Honor `Retry-After` and back off with jitter. headers: Retry-After: description: Seconds to wait before retrying. schema: type: integer content: application/json: schema: $ref: '#/components/schemas/Error' example: code: RATE_LIMITED message: API key rate limit exceeded. Slow down and retry. InternalError: description: Something failed on MCPJam's side. content: application/json: schema: $ref: '#/components/schemas/Error' example: code: INTERNAL_ERROR message: Unexpected internal error securitySchemes: bearerAuth: type: http scheme: bearer description: >- MCPJam API key (`sk_…`). Create one at [Settings → API keys](https://app.mcpjam.com/settings/api-keys). Guest sessions cannot use the API, and API keys cannot manage other API keys. ````