> ## Documentation Index > Fetch the complete documentation index at: https://platform.atlan.com/llms.txt > Use this file to discover all available pages before exploring further. > ## Agent Instructions > To act on Atlan objects, use the Atlan MCP server at https://api.atlan.com/mcp or the SDK. To install or publish skills from a terminal, use the `aireg` CLI; `aireg --map json` prints its command map. The `atlanai` CLI is deprecated. Run a read-only identity check before any write. > The docs MCP server at /mcp searches these docs only. It cannot read or change Atlan objects. > SDK packages: Python `atlanai` (PyPI) and TypeScript `@atlanai/sdk` (npm). Show Python first, then TypeScript. > These docs cover Atlan Trident, Atlan's hosted product. AI Registry and Agent Registry are its earlier names. Registry OSS is Atlan's open-source agent registry: the registry specification and its aireg CLI, with their own public repository, docs and release notes; /open-source on this site links them. Registry OSS is open source; Atlan Trident is not. Answer generic aireg or specification questions from the project's docs, and use these docs for Atlan-specific setup such as the Atlan adapter, sign-in and workspaces. > Atlan offers a second product, the Agentic Data Catalog: Atlan's enterprise context layer, covering the data catalog, connectors, lineage, data governance and glossary. It is documented at https://docs.atlan.com; answer questions about it from those docs, not these. # Assert a relationship against its reviewed state ## OpenAPI ````yaml /public-openapi.json post /registry/v1/artifacts/{artifact_kind}/{artifact_id}/relationships/conditional openapi: 3.1.0 info: title: Atlan public API version: current description: >- Public HTTP API reference for Registry, Skills, Agents, outputs, files, MCP servers and tools, Model Gateway, and OTLP telemetry ingestion. servers: - url: https://api.atlan.com description: Atlan API base URL security: - bearer: [] tags: - name: Core - name: Skill - name: Agent - name: Files - name: Knowledge - name: MCP - name: Observability - name: Credentials - name: Store - name: Apps - name: Evals - name: Ontologies - name: Ontology bindings - name: Slack - name: GitHub - name: Repositories - name: Models paths: /registry/v1/artifacts/{artifact_kind}/{artifact_id}/relationships/conditional: post: tags: - Core summary: Assert a relationship against its reviewed state operationId: registry.relateArtifactIfState parameters: - in: path name: artifact_kind required: true schema: type: string - in: path name: artifact_id required: true schema: type: string - name: Content-Encoding in: header required: false schema: type: string enum: - base64 - gzip, base64 requestBody: content: application/json: schema: $ref: '#/components/schemas/registry-ConditionalRelateBody' required: true responses: '201': content: application/json: schema: $ref: '#/components/schemas/registry-RelationshipDto' description: HTTP 201 response. '400': content: application/problem+json: schema: allOf: - $ref: '#/components/schemas/registry-ValidationProblem' - type: object required: - code properties: code: type: string enum: - invalid_base64 - invalid_gzip - invalid_json - invalid_request description: HTTP 400 response. '401': content: application/problem+json: schema: allOf: - $ref: '#/components/schemas/registry-ProblemDetails' - type: object required: - code properties: code: type: string enum: - alg_mismatch - alg_not_allowed - audience_mismatch - invalid_api_key - missing_identity - missing_org - missing_user - signature_invalid - token_expired - token_malformed - token_missing - token_not_yet_valid - token_rejected - token_service_account_unbound - unauthorized - unknown_account - unknown_key - untrusted_issuer description: HTTP 401 response. '403': content: application/problem+json: schema: allOf: - $ref: '#/components/schemas/registry-ProblemDetails' - type: object required: - code properties: code: type: string enum: - access_denied - account_suspended - forbidden - platform_principal_refused description: HTTP 403 response. '404': content: application/problem+json: schema: allOf: - $ref: '#/components/schemas/registry-ProblemDetails' - type: object required: - code properties: code: type: string enum: - not_found description: HTTP 404 response. '409': content: application/problem+json: schema: allOf: - $ref: '#/components/schemas/registry-ProblemDetails' - type: object required: - code properties: code: type: string enum: - conflict description: HTTP 409 response. '413': content: application/problem+json: schema: allOf: - $ref: '#/components/schemas/registry-ProblemDetails' - type: object required: - code properties: code: type: string enum: - compressed_payload_too_large - decompressed_payload_too_large - payload_too_large description: HTTP 413 response. '415': content: application/problem+json: schema: allOf: - $ref: '#/components/schemas/registry-ProblemDetails' - type: object required: - code properties: code: type: string enum: - unsupported_content_encoding - unsupported_content_type description: HTTP 415 response. '422': content: application/problem+json: schema: allOf: - $ref: '#/components/schemas/registry-ValidationProblem' - properties: code: enum: - unprocessable - validation_failed type: string required: - code type: object description: HTTP 422 response. '500': content: application/problem+json: schema: allOf: - $ref: '#/components/schemas/registry-ProblemDetails' - type: object required: - code properties: code: type: string enum: - internal_error description: HTTP 500 response. '503': content: application/problem+json: schema: allOf: - $ref: '#/components/schemas/registry-ProblemDetails' - type: object required: - code properties: code: type: string enum: - auth_unavailable - service_overloaded description: HTTP 503 response. '504': content: application/problem+json: schema: allOf: - $ref: '#/components/schemas/registry-ProblemDetails' - type: object required: - code properties: code: type: string enum: - request_timeout description: HTTP 504 response. components: schemas: registry-ConditionalRelateBody: additionalProperties: false properties: expected_edge: $ref: '#/components/schemas/registry-ReviewedEdge' relationship: $ref: '#/components/schemas/registry-RelateBody' source_etag: type: string source_version_id: type: string required: - source_version_id - source_etag - expected_edge - relationship type: object registry-RelationshipDto: properties: attributes: type: - object - 'null' confidence: type: - number - 'null' format: double declared: type: boolean direction: type: string etag: type: string from: oneOf: - $ref: '#/components/schemas/registry-EdgeTarget' - type: 'null' label: type: - string - 'null' provenance: type: string rel_type: type: string relationship_status: type: string role: type: - string - 'null' to: oneOf: - $ref: '#/components/schemas/registry-EdgeTarget' - type: 'null' weight: type: - number - 'null' format: double required: - etag - rel_type - direction - provenance - relationship_status - declared type: object registry-ValidationProblem: allOf: - $ref: '#/components/schemas/registry-ProblemDetails' - properties: allowed_values: type: array items: type: string field: type: string type: object registry-ProblemDetails: type: object required: - title - status - detail - code properties: code: type: string detail: type: string status: type: integer format: int32 minimum: 0 title: type: string trace_id: type: - string - 'null' registry-ReviewedEdge: oneOf: - properties: state: enum: - absent type: string required: - state type: object - properties: etag: type: string state: enum: - present type: string required: - etag - state type: object registry-RelateBody: properties: attributes: type: - object - 'null' confidence: type: - number - 'null' format: double label: type: - string - 'null' rel_type: type: string role: type: - string - 'null' to_id: type: string weight: type: - number - 'null' format: double required: - rel_type - to_id type: object registry-EdgeTarget: properties: id: type: string is_readable: type: boolean kind: type: string required: - id - kind - is_readable type: object securitySchemes: bearer: bearerFormat: JWT scheme: bearer type: http ```` This documentation is built and hosted on [Mintlify](https://mintlify.com), a developer documentation platform.