> ## Documentation Index > Fetch the complete documentation index at: https://docs.getreply.in/llms.txt > Use this file to discover all available pages before exploring further. # Add a tag > Adds a tag, as Add a tag does in the app. A name another tag has (any letter case) is refused: validation_error on name, with the app's words as reason ("A tag with this name already exists."). An empty name: "A tag can't be empty.". Without colour, grey. Permission: A Full key. ## OpenAPI ````yaml /openapi.json post /v1/tags openapi: 3.1.0 info: title: GetReply API version: 1.0.0 description: >- Send WhatsApp messages, templates, OTPs and campaigns from your own software. Every request needs an API key (Developer → API keys) as a Bearer token. Requests sent here are real and charged like any other. servers: - url: https://api.getreply.in description: GetReply security: - bearerAuth: [] tags: - name: Account - name: Messages - name: Templates - name: Contacts - name: Inbox - name: Campaigns - name: Webhooks - name: Request log paths: /v1/tags: post: tags: - Contacts summary: Add a tag description: >- Adds a tag, as Add a tag does in the app. A name another tag has (any letter case) is refused: validation_error on name, with the app's words as reason ("A tag with this name already exists."). An empty name: "A tag can't be empty.". Without colour, grey. Permission: A Full key. parameters: - name: Idempotency-Key in: header required: true description: >- Your own unique id for this request (at most 255 characters). The same id and body within 24 hours answers the first answer again — never a second send or charge. schema: type: string maxLength: 255 example: tag-vip-buyers requestBody: required: true content: application/json: schema: type: object required: - name properties: name: type: string description: At most 40 characters. maxLength: 40 colour: type: string enum: - green - amber - red - grey description: >- One of four colours (any letter case); another: validation_error on colour ("Use green, amber, red or grey."). example: name: VIP buyers colour: amber responses: '201': description: Added. content: application/json: schema: type: object properties: name: type: string colour: type: string enum: - green - amber - red - grey example: name: string colour: green '400': description: 'validation_error: Some fields are missing or wrong.' content: application/json: schema: $ref: '#/components/schemas/Error' examples: validation_error: value: error: code: validation_error message: Some fields are missing or wrong. '401': description: 'unauthorized: API key is missing or not valid.' content: application/json: schema: $ref: '#/components/schemas/Error' examples: unauthorized: value: error: code: unauthorized message: API key is missing or not valid. '403': description: >- key_off: This API key is switched off. · forbidden_scope: This API key isn't allowed to do this. · ip_not_allowed: Requests from this IP address aren't allowed for this key. · needs_pro_plan: The API needs the Pro plan. · plan_ended: Your plan has ended. Renew it to send messages. content: application/json: schema: $ref: '#/components/schemas/Error' examples: key_off: value: error: code: key_off message: This API key is switched off. forbidden_scope: value: error: code: forbidden_scope message: This API key isn't allowed to do this. ip_not_allowed: value: error: code: ip_not_allowed message: >- Requests from this IP address aren't allowed for this key. needs_pro_plan: value: error: code: needs_pro_plan message: The API needs the Pro plan. plan_ended: value: error: code: plan_ended message: Your plan has ended. Renew it to send messages. '409': description: >- request_id_reused: This request ID was already used for a different request. content: application/json: schema: $ref: '#/components/schemas/Error' examples: request_id_reused: value: error: code: request_id_reused message: >- This request ID was already used for a different request. '429': description: 'rate_limited: Too many requests. Try again in a few seconds.' content: application/json: schema: $ref: '#/components/schemas/Error' examples: rate_limited: value: error: code: rate_limited message: Too many requests. Try again in a few seconds. '500': description: 'server_error: Something went wrong on our side. Try again.' content: application/json: schema: $ref: '#/components/schemas/Error' examples: server_error: value: error: code: server_error message: Something went wrong on our side. Try again. components: schemas: Error: type: object required: - error properties: error: type: object required: - code - message properties: code: type: string message: type: string field: type: string description: >- The one field that is wrong, when there is one: its path in your request, 0-based for lists, e.g. buttons[0].phone, header.text, audience.numbers[12].to. example: buttons[0].phone reason: type: string description: >- validation_error only: what is wrong with that field, in plain words, when we have words for that check. Left out otherwise. example: Add a valid phone number. securitySchemes: bearerAuth: type: http scheme: bearer description: Your API key, e.g. gr_live_… ```` This documentation is built and hosted on [Mintlify](https://mintlify.com), a developer documentation platform.