> ## Documentation Index > Fetch the complete documentation index at: https://docs.sync2books.com/llms.txt > Use this file to discover all available pages before exploring further. # Check your key > Returns the application, environment and permissions behind the key you used. This is the first call to make: it confirms the key works and tells you what it may do. Needs no scope: any valid key can call it. ## OpenAPI ````yaml /openapi/etims.json get /v1/me openapi: 3.1.0 info: title: Sync2Books Compliance API (eTIMS) version: 1.0.0 description: >- Register items, issue sales and credit notes, record stock and read supplier invoices for a Kenyan business, with every fiscal document signed by KRA eTIMS. Authenticate with an API key from the compliance dashboard, sent in the `x-api-key` header or as a bearer token. A `cmp_sk_test_...` key acts on sandbox businesses and a `cmp_sk_live_...` key on production ones; both use the same base URL. New here? Start with the [eTIMS quickstart](/etims-quickstart). The conventions every endpoint shares are in [Authentication & API keys](/etims-authentication), [Errors & Troubleshooting](/etims-errors), [Idempotency](/etims-idempotency) and [Rate limits](/etims-rate-limits). This is a separate product from the [Accounting API](/api-reference), with its own keys. servers: - url: https://sync2books-compliance-api.apps.kintro.money description: >- Sync2Books Compliance API. The key you use decides whether a call reaches the KRA sandbox or production. security: - ApiKeyAuth: [] - BearerAuth: [] tags: - name: Identity description: Check what a key can do. - name: Businesses description: The businesses and branches a key can act for. - name: Items description: >- Create items and register them with KRA. An item must be registered before it can be sold. - name: Stock description: Record stock movements and report them to KRA. - name: Sales description: Issue sales, read them back and download KRA-signed receipts. - name: Credit notes description: Reverse an accepted sale in full. - name: Purchases description: Supplier invoices KRA holds against the business. - name: Lookups description: KRA code lists and item classifications. paths: /v1/me: get: tags: - Identity summary: Check your key description: >- Returns the application, environment and permissions behind the key you used. This is the first call to make: it confirms the key works and tells you what it may do. Needs no scope: any valid key can call it. operationId: getMe responses: '200': description: What the key can do. headers: X-RateLimit-Limit: $ref: '#/components/headers/RateLimitLimit' X-RateLimit-Remaining: $ref: '#/components/headers/RateLimitRemaining' X-RateLimit-Reset: $ref: '#/components/headers/RateLimitReset' content: application/json: schema: type: object required: - data properties: data: type: object properties: applicationId: type: string environment: $ref: '#/components/schemas/Environment' businessId: type: - string - 'null' description: >- The business a business-bound key is limited to. `null` for an organisation-wide key. scope: type: string enum: - business - organization scopes: type: array items: type: string rateLimitPerMin: type: integer description: Requests per minute your application may make. example: data: applicationId: app_example_1 environment: SANDBOX businessId: biz_example_1 scope: business scopes: - catalog:read - catalog:write - sales:read - sales:write - stock:write - purchases:read - lookups:read rateLimitPerMin: 120 '401': $ref: '#/components/responses/Unauthorized' '429': $ref: '#/components/responses/RateLimited' components: headers: RateLimitLimit: description: Requests allowed per minute for your application. schema: type: integer RateLimitRemaining: description: Requests left in the current one-minute window. schema: type: integer RateLimitReset: description: >- Seconds until the current window resets. This is a number of seconds, not a Unix timestamp. schema: type: integer schemas: Environment: type: string enum: - SANDBOX - PRODUCTION description: >- `SANDBOX` is the KRA test environment. `PRODUCTION` files real tax documents. Error: type: object required: - error properties: error: type: object required: - code - message additionalProperties: true properties: code: type: string description: >- A stable, machine-readable code. Branch on this. See [Errors & Troubleshooting](/etims-errors) for the full list. examples: - invalid_request - kra_rejected - already_credited message: type: string description: >- A human-readable explanation. The wording can change; do not parse it. description: >- Some errors carry extra fields next to `code` and `message`, for example `sale`, `item`, `errors`, `creditNoteId` or `branches`. responses: Unauthorized: description: >- The key is missing, malformed, revoked, expired or belongs to a suspended application. The response never says which. content: application/json: schema: $ref: '#/components/schemas/Error' examples: invalid_api_key: summary: invalid_api_key value: error: code: invalid_api_key message: Invalid API key RateLimited: description: >- The application has used its requests for this minute. Wait `Retry-After` seconds. headers: X-RateLimit-Limit: $ref: '#/components/headers/RateLimitLimit' X-RateLimit-Remaining: $ref: '#/components/headers/RateLimitRemaining' X-RateLimit-Reset: $ref: '#/components/headers/RateLimitReset' Retry-After: description: Seconds to wait before trying again. schema: type: integer content: application/json: schema: $ref: '#/components/schemas/Error' examples: rate_limited: summary: rate_limited value: error: code: rate_limited message: >- Rate limit of 120 requests per minute exceeded. Retry in 23s. securitySchemes: ApiKeyAuth: type: apiKey in: header name: x-api-key description: >- Your API key, for example `cmp_sk_test_xxxxxxxxxxxxxxxxxxxxxxxx`. Create one on the Integrations page of the compliance dashboard. BearerAuth: type: http scheme: bearer bearerFormat: cmp_sk_... description: >- The same key, sent as `Authorization: Bearer `. Use this if your HTTP client makes custom headers awkward. ```` This documentation is built and hosted on [Mintlify](https://mintlify.com), a developer documentation platform.