> ## Documentation Index > Fetch the complete documentation index at: https://docs.neo.projectdiscovery.io/llms.txt > Use this file to discover all available pages before exploring further. # Start an AI provider sign-in > Creates a short-lived, user-bound sign-in session for the requested provider. The returned flow determines whether the client opens a browser URL or presents a device code. Providers advertised with the setup_token flow, including Claude, are rejected by this endpoint. ## OpenAPI ````yaml /openapi/neo.public.openapi.json post /api/v1/ai-connections/oauth/start openapi: 3.1.0 info: contact: name: ProjectDiscovery url: https://neo.projectdiscovery.io description: Neo API Server - Security agent orchestration platform license: name: Apache 2.0 url: https://www.apache.org/licenses/LICENSE-2.0 title: Neo API version: 1.0.0 servers: - description: Production url: https://neo.api.projectdiscovery.io - description: Development url: https://neo.api.dev.projectdiscovery.io - description: Local development url: http://localhost:8080 security: [] tags: - description: Task execution and management name: Tasks - description: Agent listing and management name: Agents - description: Public agent directory name: Agent Directory - description: User file storage management name: Files - description: User working memory management name: Memory - description: Scheduled and recurring task management name: Schedules - description: Knowledge base and semantic search name: Knowledge - description: Encrypted user credentials and API keys name: Secrets - description: Neo API key management for programmatic access name: API Keys - description: User profile and account information name: User - description: Task and LLM usage tracking name: Usage - description: Bring Your Own Key provider management name: BYOK - description: Connect personal AI provider accounts and select them as a model source name: AI Connections - description: Model discovery and capabilities name: Models - description: Third-party integrations name: Integrations - description: Skill knowledge documents for agent prompts name: Skills - description: User-authored tools and toolkit management name: Dynamic Tools - description: Team management and member invitations name: Teams - description: Prompt library management and discovery name: Prompts - description: Slack bot integration for workspace installation and OAuth name: Slack - description: GitHub integration for PR reviews and repository management name: GitHub - description: Vulnerability issue tracking and management name: Issues - description: Subscription billing and plans name: Billing - description: Project management and member assignments name: Projects - description: SSH key pair generation and management for remote server access name: SSH Keys - description: Codebase structural analysis and mapping name: Codemaps - description: AI-generated codebase documentation and security analysis name: CodeWiki - description: Captured HTTP traffic query and replay name: Network Events - description: User and team API activity metadata name: Audit Logs - description: Vulnerability triage for HackerOne, GitHub, and Security Inbox name: Triage paths: /api/v1/ai-connections/oauth/start: post: tags: - AI Connections summary: Start an AI provider sign-in description: | Creates a short-lived, user-bound sign-in session for the requested provider. The returned flow determines whether the client opens a browser URL or presents a device code. Providers advertised with the setup_token flow, including Claude, are rejected by this endpoint. operationId: post-v1-ai-connections-oauth-start requestBody: content: application/json: schema: $ref: '#/components/schemas/AIConnectionOAuthStartRequest' required: true responses: '200': content: application/json: schema: $ref: '#/components/schemas/AIConnectionOAuthStartResponse' description: Sign-in flow started '400': content: application/json: schema: $ref: '#/components/schemas/ErrorResponse' description: Invalid provider or provider does not support OAuth '401': content: application/json: schema: $ref: '#/components/schemas/ErrorResponse' description: Authentication required '403': content: application/json: schema: $ref: '#/components/schemas/ErrorResponse' description: AI connections are not enabled for the current user '500': content: application/json: schema: $ref: '#/components/schemas/ErrorResponse' description: Internal server error '502': content: application/json: schema: $ref: '#/components/schemas/ErrorResponse' description: AI connection service rejected the sign-in request '503': content: application/json: schema: $ref: '#/components/schemas/ErrorResponse' description: AI connection service is not configured or unavailable security: - BearerAuth: [] - ApiKeyAuth: [] components: schemas: AIConnectionOAuthStartRequest: properties: provider: maxLength: 64 minLength: 1 pattern: ^[a-z0-9][a-z0-9-]*$ type: string required: - provider type: object AIConnectionOAuthStartResponse: properties: expires_in: type: integer flow: enum: - browser - device type: string x-enum-varnames: - AIConnectionOAuthStartResponseFlowBrowser - AIConnectionOAuthStartResponseFlowDevice state: maxLength: 2048 minLength: 16 type: string url: format: uri maxLength: 4096 type: string user_code: type: string required: - url - state - flow type: object ErrorResponse: properties: code: description: > Stable machine-readable error code — branch on this rather than matching the human `error`/`message` strings. Domain codes include `user_spending_cap_reached`, `project_spending_cap_reached`, and `insufficient_neo_credits`; Free/usage codes include `free_grant_challenge_required`, `free_usage_exhausted`, `free_task_budget_exhausted`, `model_not_available_on_free`, `sandbox_not_available_on_free` (cloud sandbox surfaces are not available on the Free plan; task files remain available from the task), `free_cannot_continue_managed_task` (a task that ran on the standard cloud sandbox cannot be continued on the Free plan; start a new task), `free_origin_not_supported` (integration-originated tasks are not available on the Free plan), `weekly_usage_limit_reached`, `billing_period_usage_limit_reached`, `topup_required`, `subscription_required`, and `isolated_workspace_purged`. Otherwise it mirrors the error kind (e.g. `forbidden`, `invalid_request`, `not_exists`, `already_exists`). example: user_spending_cap_reached type: string error: example: Bad request type: string error_id: description: Correlation id for a specific error instance, when present. type: string kind: description: Coarse error category (e.g. "forbidden request", "invalid request"). example: forbidden request type: string message: description: | Human-readable detail (the kind prefixed to the error). For display, not for branching. type: string turnstile_site_key: description: | Public Cloudflare Turnstile site key returned only with `free_grant_challenge_required`, so the client can complete the invisible verification before retrying the request. type: string required: - error type: object securitySchemes: BearerAuth: bearerFormat: JWT description: JWT authentication token scheme: bearer type: http ApiKeyAuth: description: Neo API key (neo_sk_* prefix) in: header name: X-Api-Key type: apiKey ````