> ## Documentation Index > Fetch the complete documentation index at: https://docs.formo.so/llms.txt > Use this file to discover all available pages before exploring further. # Create Label > Add or update one or more labels on a wallet profile. Labels tag wallets with custom attributes like VIP tier, airdrop eligibility, or verification status. ## OpenAPI ````yaml POST /v0/profiles/{address}/labels openapi: 3.1.0 info: title: Formo Public API description: >- REST API for managing Formo projects, analytics, alerts, boards, charts, contracts, segments, and AI chat. **Auth.** All endpoints require a workspace API key with the appropriate scopes (see `x-api-scopes`). **Response shape.** Successful responses return the resource directly (or `{ data: [...], total, page, size, has_more }` for paginated lists). HTTP status carries success/failure; there is no envelope wrapping success bodies. **Errors.** Every non-2xx response uses the `Error` envelope: `{ error: { code, message, doc_url, param?, details? } }`. Branch on the machine-readable `code` (see `ErrorCode` enum) and follow `doc_url` to the matching section of the [errors reference](https://docs.formo.so/api/errors). **Idempotency.** Pass an `Idempotency-Key` header on POST/PUT/PATCH/DELETE to make retries safe; the response is cached for 24 h and replayed on duplicate keys. version: 0.1.0 contact: name: Formo url: https://formo.so servers: - url: https://api.formo.so description: API Server (boards, alerts, contracts, segments, profiles, query, import) - url: https://events.formo.so description: Events Server (event ingestion) security: - WorkspaceApiKey: [] tags: - name: Alerts description: Manage project alerts and notifications - name: Boards description: Manage dashboard boards - name: Charts description: Manage charts within boards - name: Contracts description: Manage blockchain contract monitoring - name: Segments description: Manage user segments - name: Profiles description: Wallet profiles and import - name: Query description: >- Execute SQL queries and call pre-built analytics endpoints (KPIs, top pages, lifecycle, retention, revenue). Requires the query:read scope. - name: Events description: Event ingestion API (events.formo.so) paths: /v0/profiles/{address}/labels: post: tags: - Profiles summary: Add or update user labels description: >- Upsert one or more labels for a wallet. Accepts either a single label object or an array of labels. Labels with the same tag_id (and chain_id, if provided) are overwritten. Requires profiles:write scope. operationId: upsertUserLabel parameters: - name: address in: path required: true schema: type: string description: >- Wallet address. Accepts an EVM (0x...) or Solana address, or an ENS name (e.g. vitalik.eth) which is resolved to an address. - $ref: '#/components/parameters/IdempotencyKey' requestBody: required: true content: application/json: schema: oneOf: - $ref: '#/components/schemas/UserLabelInput' - type: array items: $ref: '#/components/schemas/UserLabelInput' minItems: 1 examples: singleLabel: summary: Upsert a single label value: tag_id: vip value: tier-1 multipleLabels: summary: Upsert multiple labels value: - tag_id: vip value: tier-1 - tag_id: airdrop_eligible value: season-2 chain_id: '1' responses: '200': description: >- Labels upserted. Single label in → bare `UserLabel`; array in → array of `UserLabel`. Echoes the normalised entries (lowercased tag_id, server timestamp). content: application/json: schema: oneOf: - $ref: '#/components/schemas/UserLabel' - type: array items: $ref: '#/components/schemas/UserLabel' '400': $ref: '#/components/responses/BadRequest' '401': $ref: '#/components/responses/Unauthorized' '403': $ref: '#/components/responses/Forbidden' '404': $ref: '#/components/responses/NotFound' '429': $ref: '#/components/responses/TooManyRequests' '500': $ref: '#/components/responses/InternalServerError' components: parameters: IdempotencyKey: name: Idempotency-Key in: header required: false schema: type: string maxLength: 255 description: >- Optional unique value (e.g. a UUID v4) that lets you safely retry POST/PUT/PATCH/DELETE requests. The first request runs normally; subsequent requests with the same key replay the stored response (status + body) for 24 hours, so retries can never double-create or double-charge. Two concurrent requests with the same key return `409 IDEMPOTENCY_IN_PROGRESS`. Generate a fresh key per logical operation. schemas: UserLabelInput: type: object required: - tag_id properties: tag_id: type: string description: >- Label identifier (lowercased on write). e.g. vip, airdrop_eligible, coinbase.verified_account value: type: string description: Optional label value (e.g. tier name, country code) chain_id: type: string description: Optional chain identifier the label applies to UserLabel: type: object description: >- Canonical user-label resource. Echoed back from upsert calls so callers can cache the normalised entry without a follow-up read. required: - address - tag_id - value - chain_id - source - timestamp properties: address: type: string description: Wallet address the label applies to tag_id: type: string description: Label identifier (lowercased + trimmed on write) value: type: string description: Label value, empty string when omitted chain_id: type: string description: Chain identifier, empty string when omitted source: type: string description: Origin of the label (e.g. 'import') timestamp: type: string format: date-time description: Server-assigned write timestamp Error: type: object description: >- Standard error envelope returned by every public API endpoint for any non-2xx response. The HTTP status code carries success/failure; the body provides a machine-readable `code`, a human-readable `message`, and a `doc_url` pointing at the matching section of the docs so agents can fetch context on the fly. properties: error: type: object required: - code - message - doc_url properties: code: $ref: '#/components/schemas/ErrorCode' message: type: string description: >- Human-readable error description. Wording may change between releases, so branch on `code`, not `message`. doc_url: type: string format: uri description: >- Link to the matching section of the errors reference at https://docs.formo.so/api/errors. param: type: string description: >- When the error pertains to a specific request field, the dotted path to that field (e.g. `body.trigger_filters.0.value`). details: type: object additionalProperties: true description: >- Code-specific extra context. For `INVALID_VALIDATION_REQUEST` this is a `{ fieldPath: message }` map of every Zod validation failure. required: - error ErrorCode: type: string description: >- Stable, enumerated error codes. New codes may be added in any release; clients should treat unknown codes as the closest matching HTTP status family. enum: - INTERNAL_SERVER_ERROR - INVALID_VALIDATION_REQUEST - UNAUTHORIZED - BAD_REQUEST - FORBIDDEN - NOT_FOUND - CONFLICT - INVALID_CHAIN_ID - CONTEXT_LIMIT_EXCEEDED - SERVICE_UNAVAILABLE - TOO_MANY_REQUESTS - IDEMPOTENCY_IN_PROGRESS - INVALID_IDEMPOTENCY_KEY responses: BadRequest: description: >- The request was rejected. `code` is either `INVALID_VALIDATION_REQUEST` (Zod schema mismatch; `details` carries a `{ fieldPath: message }` map) or `BAD_REQUEST` (semantic validation failure outside Zod, e.g. mismatched IDs, business-rule violations). Branch on `code`, not status, to tell the two apart. content: application/json: schema: $ref: '#/components/schemas/Error' examples: validation: summary: Zod schema mismatch value: error: code: INVALID_VALIDATION_REQUEST message: Invalid request data doc_url: https://docs.formo.so/api/errors#invalid_validation_request details: body.name: String must contain at least 1 character(s) semantic: summary: Semantic validation failure value: error: code: BAD_REQUEST message: Target board must be different from the current board doc_url: https://docs.formo.so/api/errors#bad_request Unauthorized: description: Missing or invalid API key. content: application/json: schema: $ref: '#/components/schemas/Error' example: error: code: UNAUTHORIZED message: Invalid API key doc_url: https://docs.formo.so/api/errors#unauthorized Forbidden: description: The API key is valid but lacks the required scope for this endpoint. content: application/json: schema: $ref: '#/components/schemas/Error' example: error: code: FORBIDDEN message: 'API key missing required scope: alerts:write' doc_url: https://docs.formo.so/api/errors#forbidden NotFound: description: >- The requested resource does not exist or is not visible to this API key's workspace. content: application/json: schema: $ref: '#/components/schemas/Error' example: error: code: NOT_FOUND message: Alert not found doc_url: https://docs.formo.so/api/errors#not_found TooManyRequests: description: >- Per-workspace rate limit exceeded. Inspect the `RateLimit-*` response headers and back off. content: application/json: schema: $ref: '#/components/schemas/Error' example: error: code: TOO_MANY_REQUESTS message: Too many requests doc_url: https://docs.formo.so/api/errors#too_many_requests InternalServerError: description: >- An unexpected error occurred on the server. The error has been logged; retry with exponential backoff. content: application/json: schema: $ref: '#/components/schemas/Error' example: error: code: INTERNAL_SERVER_ERROR message: Internal Server Error doc_url: https://docs.formo.so/api/errors#internal_server_error securitySchemes: WorkspaceApiKey: type: http scheme: bearer description: >- Workspace API key (e.g. `formo_xxx`). Create one in the Formo dashboard under Team Settings > API Keys. ````