> ## Documentation Index > Fetch the complete documentation index at: https://openlayer.com/docs/llms.txt > Use this file to discover all available pages before exploring further. # Attach evidence to a rule result > Attach evidence to a rule result. ## OpenAPI ````yaml post /rule-results/{ruleResultId}/evidence openapi: 3.0.3 info: contact: email: support@openlayer.com name: Openlayer url: https://openlayer.com/ description: API for interacting with the Openlayer server. title: Openlayer API version: '1.0' x-logo: url: https://logo.clearbit.com/openlayer.com servers: - url: https://api.openlayer.com/v1 description: Our prod backend security: - bearerAuth: [] paths: /rule-results/{ruleResultId}/evidence: post: tags: - Governance summary: Attach evidence to a rule result description: Attach evidence to a rule result. operationId: createRuleResultEvidence parameters: - $ref: '#/components/parameters/ruleResultId' requestBody: required: true content: application/json: schema: type: object properties: name: 4d34a4a8-09b3-44ec-a8ef-d60bdfcfc6e3 description: 510ce6a7-bb8f-43a6-bc36-d7f8263d38b4 storageUri: 42539127-cc1e-45f5-9ce6-605111cf8919 text: 282d1f3f-75be-4b36-8685-4f579cb7fe72 url: 2733b641-7edc-4f4e-b59a-15b18c9c7273 responses: '201': description: >- Evidence created. The rule result is re-evaluated, and its renewal window restarts from this evidence. content: application/json: schema: $ref: '#/components/schemas/Evidence' default: $ref: '#/components/responses/UnexpectedError' x-codeSamples: - lang: python source: | from openlayer import Openlayer client = Openlayer() evidence = client.governance.rule_results.create_evidence( "6f7a8b9c-0d1e-4f2a-8b3c-4d5e6f7a8b9c", name="Model card", url="https://example.com/model-card", ) print(evidence.id) - lang: typescript source: > import Openlayer from 'openlayer'; const client = new Openlayer(); const evidence = await client.governance.ruleResults.createEvidence('6f7a8b9c-0d1e-4f2a-8b3c-4d5e6f7a8b9c', { name: 'Model risk assessment 2026', url: 'https://example.com/model-risk-assessment.pdf', }); console.log(evidence.id); - lang: go source: "package main\n\nimport (\n\t\"context\"\n\t\"fmt\"\n\n\t\"github.com/openlayer-ai/openlayer-go\"\n)\n\nclient := openlayer.NewClient()\nevidence, err := client.Governance.RuleResults.NewEvidence(\n\tcontext.TODO(),\n\t\"6f7a8b9c-0d1e-4f2a-8b3c-4d5e6f7a8b9c\",\n\topenlayer.GovernanceRuleResultNewEvidenceParams{\n\t\tName: openlayer.F(\"Model card v3\"),\n\t\tURL: openlayer.F(\"https://example.com/model-card-v3.pdf\"),\n\t},\n)\nif err != nil {\n\tpanic(err.Error())\n}\nfmt.Printf(\"%+v\\n\", evidence.ID)\n" - lang: java source: > import com.openlayer.api.client.OpenlayerClient; import com.openlayer.api.client.okhttp.OpenlayerOkHttpClient; import com.openlayer.api.models.governance.ruleresults.RuleResultCreateEvidenceParams; import com.openlayer.api.models.governance.ruleresults.RuleResultCreateEvidenceResponse; OpenlayerClient client = OpenlayerOkHttpClient.fromEnv(); RuleResultCreateEvidenceParams params = RuleResultCreateEvidenceParams.builder() .ruleResultId("6f7a8b9c-0d1e-4f2a-8b3c-4d5e6f7a8b9c") .name("Model risk assessment 2026") .url("https://example.com/model-risk-assessment-2026.pdf") .build(); RuleResultCreateEvidenceResponse evidence = client.governance().ruleResults().createEvidence(params); - lang: ruby source: | require "openlayer" openlayer = Openlayer::Client.new(api_key: ENV["OPENLAYER_API_KEY"]) evidence = openlayer.governance.rule_results.create_evidence( "6f7a8b9c-0d1e-4f2a-8b3c-4d5e6f7a8b9c", name: "Model risk assessment 2026", url: "https://openlayer.com/evidence" ) puts(evidence) - lang: curl source: | curl --request POST \ --url https://api.openlayer.com/v1/rule-results/2c4e6a8b-1d3f-4b5c-9e7a-0f1b2c3d4e5f/evidence \ --header 'Authorization: Bearer ' \ --header 'Content-Type: application/json' \ --data '{ "name": "2026 model risk review", "description": "Signed off by the risk committee.", "url": "https://example.com/reviews/2026-model-risk.pdf" }' components: parameters: ruleResultId: name: ruleResultId in: path description: The rule result id. required: true schema: type: string format: uuid schemas: Evidence: type: object description: > Evidence attached to a rule result to satisfy an evidence rule. Which field holds it depends on the rule's `evidenceType`: `storageUri` for a document, `text` for a written statement, or `url` for a link. properties: id: type: string format: uuid readOnly: true description: The evidence id. name: type: string nullable: true maxLength: 120 description: The evidence name. example: Model risk assessment 2026 description: type: string nullable: true description: A description of what the evidence shows. storageUri: type: string nullable: true description: > Where the uploaded file is stored. Set when the rule's `evidenceType` is `document`. Upload the file first with `POST /storage/presigned-url` and send the storage URI it returns. example: s3://openlayer-evidence/evidence.pdf text: type: string nullable: true description: The evidence text. Set when the rule's `evidenceType` is `text`. url: type: string format: uri nullable: true description: A link to the evidence. Set when the rule's `evidenceType` is `url`. example: https://openlayer.com/evidence creatorId: type: string format: uuid nullable: true readOnly: true description: The user who attached the evidence. dateCreated: type: string format: date-time readOnly: true description: The creation date. example: '2026-03-22T11:31:01.185Z' dateUpdated: type: string format: date-time readOnly: true description: The last update date. example: '2026-03-22T11:31:01.185Z' required: - id - creatorId - dateCreated - dateUpdated responses: UnexpectedError: description: Unexpected error. content: application/json: schema: type: object required: - code - error properties: code: type: integer format: int32 error: type: string securitySchemes: bearerAuth: type: http scheme: bearer description: > Bearer authentication header of the form `Bearer `, where `` is your workspace API key. See [Find your API key](https://www.openlayer.com/docs/workspace-and-projects/find-your-api-key) for more information. ```` This documentation is built and hosted on [Mintlify](https://mintlify.com), a developer documentation platform.