> ## Documentation Index > Fetch the complete documentation index at: https://docs.canary.effectiveai.app/llms.txt > Use this file to discover all available pages before exploring further. # Get a skill for local agents > Get one skill served to local agents, with every file in its folder. A skill is a folder of instructions, a SKILL.md and the references and scripts it uses, that agents such as Claude Code, Codex and Cursor load from disk. Effective's skills use the Effective MCP server, so connect it in the same agent. An unknown skill ID returns 404. Free, read-only and safe to retry. ## OpenAPI ````yaml /openapi.json get /skills/{skillId} openapi: 3.0.3 info: title: Effective API version: 2.0.0 description: The public Effective REST API. Authenticate using an Effective API key. servers: - url: https://api.canary.effectiveai.app/api/v2 description: Canary security: - bearerAuth: [] paths: /skills/{skillId}: get: tags: - Skills summary: Get a skill for local agents description: >- Get one skill served to local agents, with every file in its folder. A skill is a folder of instructions, a SKILL.md and the references and scripts it uses, that agents such as Claude Code, Codex and Cursor load from disk. Effective's skills use the Effective MCP server, so connect it in the same agent. An unknown skill ID returns 404. Free, read-only and safe to retry. operationId: getSkill parameters: - schema: type: string maxLength: 74 pattern: ^effective:[a-z0-9]+(?:-[a-z0-9]+)*$ description: >- Skill ID: its source and name, such as `effective:effective`. Stable while the skill keeps its name. example: effective:effective required: true description: >- Skill ID: its source and name, such as `effective:effective`. Stable while the skill keeps its name. name: skillId in: path responses: '200': description: The skill and its files. content: application/json: schema: $ref: '#/components/schemas/V2SkillDetail' '400': description: Invalid skill ID. content: application/json: schema: $ref: '#/components/schemas/V2CodedError' '401': description: Authentication required. content: application/json: schema: $ref: '#/components/schemas/V2CodedError' '403': description: Credential not permitted. content: application/json: schema: $ref: '#/components/schemas/V2CodedError' '404': description: No skill has this ID. content: application/json: schema: $ref: '#/components/schemas/V2CodedError' security: - bearerAuth: [] components: schemas: V2SkillDetail: allOf: - $ref: '#/components/schemas/V2Skill' - type: object properties: files: type: array items: type: object properties: path: type: string description: >- Path inside the skill folder, such as `references/tables.md`. sizeBytes: type: integer minimum: 0 required: - path - sizeBytes additionalProperties: false description: Every file in the skill folder, ordered by path. required: - files additionalProperties: false V2CodedError: allOf: - $ref: '#/components/schemas/V2Error' - type: object properties: code: type: string minLength: 1 description: Stable error code. Clients must tolerate unknown future codes. details: type: array items: type: object properties: location: type: string enum: - path - query - header - body path: type: array items: type: string maxLength: 64 maxItems: 12 code: type: string enum: - required - invalid_type - invalid_value - unknown_field message: type: string minLength: 1 maxLength: 200 required: - location - path - code - message minItems: 1 maxItems: 20 description: Bounded safe validation issues; may omit some invalid fields. requestId: type: string minLength: 1 maxLength: 128 description: >- Existing server correlation for this HTTP attempt, when available. dataset: type: string enum: - naic - osha description: Dataset needed for dataset_not_enabled. businessCode: type: string description: The rater’s own refusal code, for business_rejection. violations: type: array items: type: object properties: code: type: string description: Authored or built-in constraint code message: type: string description: Authored message for the failed constraint path: type: string description: Input path of the offending value; empty for the request value: nullable: true description: Offending input value, size-bounded by the runtime constraint: type: string description: The constraint the value failed, as text cite: type: string nullable: true description: >- Filing citation of the constraint, when the source cites one required: - code - message - path - value - constraint - cite additionalProperties: false maxItems: 256 description: >- Each input constraint the submission failed, for invalid_inputs and business_rejection. violationsTruncated: type: boolean description: >- True when the rater reported more violations than violations holds. executionId: type: string description: >- The recorded execution of a failed rating, for rater rating failures. accessUrl: type: string nullable: true format: uri description: >- Where to add the product to your account, for product_access_required. required: - code V2Skill: type: object properties: id: type: string maxLength: 74 pattern: ^effective:[a-z0-9]+(?:-[a-z0-9]+)*$ description: >- Skill ID: its source and name, such as `effective:effective`. Stable while the skill keeps its name. example: effective:effective name: type: string maxLength: 64 pattern: ^[a-z0-9]+(?:-[a-z0-9]+)*$ description: >- Skill name, as its SKILL.md frontmatter declares it: lowercase words joined by hyphens. Install the skill in a folder of this name, such as `~/.claude/skills//`. example: effective description: type: string description: >- The SKILL.md frontmatter description: what the skill does and when to use it. source: type: string enum: - effective description: 'Where the skill comes from. `effective`: Effective''s own skills.' contentHash: type: string pattern: ^sha256:[0-9a-f]{64}$ description: >- Hash of the skill folder's file paths and bytes. It changes exactly when the skill's content changes, so a client that stored it can tell whether its copy is current. The ETag of downloadSkill is this value, quoted. fileCount: type: integer minimum: 1 description: Files in the skill folder, SKILL.md included. sizeBytes: type: integer minimum: 0 description: Total size of those files, in bytes. required: - id - name - description - source - contentHash - fileCount - sizeBytes additionalProperties: false V2Error: type: object properties: error: type: string minLength: 1 description: Human-readable explanation of the failure. required: - error securitySchemes: bearerAuth: type: http scheme: bearer description: 'Effective API key. Send Authorization: Bearer sk-eai-...' ```` This documentation is built and hosted on [Mintlify](https://mintlify.com), a developer documentation platform.