> ## Documentation Index > Fetch the complete documentation index at: https://docs.fuseai.com/llms.txt > Use this file to discover all available pages before exploring further. # Start a draft agent (spends credits) > Starts a DRAFT agent and SPENDS CREDITS. It creates the agent's results list, checks and deducts the balance, sets up the provider subscriptions and kicks off the first run; the agent moves through `processing` to `active` (a scrape stays `processing` until the scrape finishes). Only drafts can be activated: there is no resume in this API, so a started, paused, expired or failed agent answers 409 AGENT_NOT_A_DRAFT — to restart a paused agent, duplicate it and activate the copy. Nothing is created or spent when the draft's `expirationDate` is not in the future (422 VALIDATION_FAILED), its name is already taken (409 LIST_NAME_TAKEN) or the balance is short (402 INSUFFICIENT_CREDITS). Any OTHER reason a config cannot be started (a source list with nothing to watch, a plan limit, a field the type's schema refuses) is not classified at activation time and answers 500 UNEXPECTED_ERROR: create the agent with `start: true` instead, which reports those properly. Answers 202 with the agent as GET returns it; keep polling GET /business/agents/{agentId} until `status` settles. Errors: - `404` `AGENT_NOT_FOUND` — No agent with this id belongs to the token owner. A deleted agent and another user's agent answer identically. - `409` `AGENT_NOT_A_DRAFT` — The agent is not a draft (status is not `initializing`): it was already started, or is paused, expired or failed. Only drafts are editable and activatable — duplicate the agent and work on the copy. - `409` `LIST_NAME_TAKEN` — `listName` is already used by one of your lists or agents. Pick another name. - `402` `INSUFFICIENT_CREDITS` — The workspace does not have enough credits to start this agent. Nothing was created or spent. - `409` `AGENT_CONFIG_MISSING` — The draft carries no stored config to work from (a legacy draft saved before configs were persisted). Create the agent again. - `409` `AGENT_TYPE_UNSUPPORTED` — The agent is of a legacy kind this API can no longer edit or activate; its `type` reads as null. - `422` `VALIDATION_FAILED` — The activation was rejected by validation: the draft's `expirationDate` is not in the future (fix it with PATCH, or duplicate the agent and set a new date), or the request itself failed this endpoint's validation (`agentId` must be a 24-character hex id). No other config problem is reported here: see the 500 entry. - `422` `AGENT_SIGNAL_REJECTED` — web-monitor only: the search provider refused the `prompt` as a searchable signal. Rewrite the prompt rather than retrying it. - `429` `RATE_LIMITED` — The agents bucket is exhausted: 30 requests per minute or 2,000 per day per token owner, shared by every /business/agents operation (a 429 raised by the agents service is relayed with this code too). Retry after the `Retry-After` header. - `500` `UNEXPECTED_ERROR` — The agents service failed (5xx, refused service credential, or a timeout after 60s) or the rate limiter was unavailable. A config the activation cannot accept for any reason other than the expiry rule (a source list with nothing to watch, a plan limit, a field the type's schema refuses) also lands here, because the agents service does not classify those at activation time. Retry later; quote `request_id` to support. Requires one of the following token scopes: agents. ## OpenAPI ````yaml /openapi.json post /business/agents/{agentId}/activate openapi: 3.1.0 info: title: Fuse Business API version: 1.0.0 description: >- External API for lists, campaigns, prospect search and contacts. Authenticate with your API token as HTTP Basic. All paths are under /api/v1. servers: - url: https://api.tryfuse.ai/api/v1 description: Production security: - basicAuth: [] tags: - name: Lists - name: Custom columns - name: Smart columns - name: Exports - name: Campaigns - name: Knowledge hubs - name: Analytics - name: Website intent - name: Account - name: Prospect search - name: Campaign steps - name: Scheduled sends - name: Campaign templates - name: Agents - name: Research - name: Company search - name: Saved searches - name: Folders - name: Contacts paths: /business/agents/{agentId}/activate: post: tags: - Agents summary: Start a draft agent (spends credits) description: >- Starts a DRAFT agent and SPENDS CREDITS. It creates the agent's results list, checks and deducts the balance, sets up the provider subscriptions and kicks off the first run; the agent moves through `processing` to `active` (a scrape stays `processing` until the scrape finishes). Only drafts can be activated: there is no resume in this API, so a started, paused, expired or failed agent answers 409 AGENT_NOT_A_DRAFT — to restart a paused agent, duplicate it and activate the copy. Nothing is created or spent when the draft's `expirationDate` is not in the future (422 VALIDATION_FAILED), its name is already taken (409 LIST_NAME_TAKEN) or the balance is short (402 INSUFFICIENT_CREDITS). Any OTHER reason a config cannot be started (a source list with nothing to watch, a plan limit, a field the type's schema refuses) is not classified at activation time and answers 500 UNEXPECTED_ERROR: create the agent with `start: true` instead, which reports those properly. Answers 202 with the agent as GET returns it; keep polling GET /business/agents/{agentId} until `status` settles. Errors: - `404` `AGENT_NOT_FOUND` — No agent with this id belongs to the token owner. A deleted agent and another user's agent answer identically. - `409` `AGENT_NOT_A_DRAFT` — The agent is not a draft (status is not `initializing`): it was already started, or is paused, expired or failed. Only drafts are editable and activatable — duplicate the agent and work on the copy. - `409` `LIST_NAME_TAKEN` — `listName` is already used by one of your lists or agents. Pick another name. - `402` `INSUFFICIENT_CREDITS` — The workspace does not have enough credits to start this agent. Nothing was created or spent. - `409` `AGENT_CONFIG_MISSING` — The draft carries no stored config to work from (a legacy draft saved before configs were persisted). Create the agent again. - `409` `AGENT_TYPE_UNSUPPORTED` — The agent is of a legacy kind this API can no longer edit or activate; its `type` reads as null. - `422` `VALIDATION_FAILED` — The activation was rejected by validation: the draft's `expirationDate` is not in the future (fix it with PATCH, or duplicate the agent and set a new date), or the request itself failed this endpoint's validation (`agentId` must be a 24-character hex id). No other config problem is reported here: see the 500 entry. - `422` `AGENT_SIGNAL_REJECTED` — web-monitor only: the search provider refused the `prompt` as a searchable signal. Rewrite the prompt rather than retrying it. - `429` `RATE_LIMITED` — The agents bucket is exhausted: 30 requests per minute or 2,000 per day per token owner, shared by every /business/agents operation (a 429 raised by the agents service is relayed with this code too). Retry after the `Retry-After` header. - `500` `UNEXPECTED_ERROR` — The agents service failed (5xx, refused service credential, or a timeout after 60s) or the rate limiter was unavailable. A config the activation cannot accept for any reason other than the expiry rule (a source list with nothing to watch, a plan limit, a field the type's schema refuses) also lands here, because the agents service does not classify those at activation time. Retry later; quote `request_id` to support. Requires one of the following token scopes: agents. operationId: activateAgent parameters: - name: agentId in: path required: true description: >- The agent's id: a 24-character hex string — the `id` of an item from GET /business/agents, or the `agent.id` a create or duplicate returned. schema: type: string description: >- The agent's id: a 24-character hex string — the `id` of an item from GET /business/agents, or the `agent.id` a create or duplicate returned. responses: '202': description: Success headers: RateLimit-Limit: schema: type: integer description: Requests permitted in the current window. RateLimit-Remaining: schema: type: integer description: Requests remaining in the current window. RateLimit-Reset: schema: type: integer description: Seconds until the current window resets. content: application/json: schema: type: object required: - agent properties: agent: type: object required: - id - type - name - status - config - isReconstructed - lossyFields - sourceLists properties: id: type: string description: >- The agent's id — pass it as `{agentId}` to every other agent operation. type: type: - string - 'null' enum: - web-monitor - person-starting-new-job - linkedin-posts - person-discovery-via-filters - job-postings - job-posting-in-location - first-person-hired-in-company-department - first-person-hired-internationally - company-headcount-growth - company-headcount-growth-over-baseline - company-department-headcount - company-employee-job-location-in-two-countries - funding-announcements - people-watcher - companies-watcher - job-changes-watcher - linkedin-profile - linkedin-post - null description: >- The public agent kind — the same slug you POST to at /business/agents/{type}. null for a legacy kind this API no longer offers. name: type: string description: >- The agent's name, which is also the name of the results list it delivers into. status: type: string enum: - initializing - processing - active - paused - expired - failed - completed - deleted description: >- initializing = saved draft, nothing billed; processing = a run is under way; active = running; paused = stopped by you; expired = past its expirationDate; failed = the provider setup failed. Older agents can also read `completed` (a one-off scrape that has finished) and `deleted` (an agent deleted before deletions were timestamped: still readable, but it can no longer be edited or activated). config: type: object additionalProperties: true description: >- The agent's config in CREATE shape: exactly the body you would POST to /business/agents/{type} (without `start`) to build this agent again. Its fields are the ones documented on that type's create operation. isReconstructed: type: boolean description: >- false = the config is the stored snapshot, returned verbatim (always the case for a draft). true = the agent was started before its snapshot existed and the config was rebuilt from the live record, so check `lossyFields`. lossyFields: type: array items: type: string description: >- Config fields that could not be recovered when `isReconstructed` is true; `["*"]` means only `name` is known. Empty otherwise. sourceLists: type: array description: >- Watcher kinds only: the source lists the config names, resolved to their names. Empty for every other kind. items: type: object required: - id - name properties: id: type: string description: The source list's id. name: type: - string - 'null' description: >- The source list's name, or null when the list has been deleted. example: agent: id: 6a8dce4e65fd738c00d8927a type: web-monitor name: Regulator fines 2026 status: processing config: listName: Regulator fines 2026 entityType: company prompt: companies fined by a financial regulator in 2026 searchPeriod: 6h numResults: 7 isReconstructed: false lossyFields: [] sourceLists: [] '400': description: Error content: application/json: schema: $ref: '#/components/schemas/Error' '401': description: Error content: application/json: schema: $ref: '#/components/schemas/Error' '402': description: Error content: application/json: schema: $ref: '#/components/schemas/Error' '403': description: Error content: application/json: schema: $ref: '#/components/schemas/Error' '404': description: Error content: application/json: schema: $ref: '#/components/schemas/Error' '409': description: Error content: application/json: schema: $ref: '#/components/schemas/Error' '422': description: Error content: application/json: schema: $ref: '#/components/schemas/Error' '429': description: Error content: application/json: schema: $ref: '#/components/schemas/Error' '500': description: Error content: application/json: schema: $ref: '#/components/schemas/Error' security: - basicAuth: [] components: schemas: Error: type: object properties: error: type: object properties: code: type: string message: type: string param: type: - string - 'null' doc_url: type: - string - 'null' request_id: type: - string - 'null' required: - code - message required: - error securitySchemes: basicAuth: type: http scheme: basic description: >- Your API token (`af_…`) as the Basic-auth username, with an empty password. ````