> ## Documentation Index > Fetch the complete documentation index at: https://docs.cope.com/llms.txt > Use this file to discover all available pages before exploring further. # Send an offer to its buyer > Delivers this offer's private checkout link to its buyer for the first time, and returns the offer. Only an `active` offer that has not lapsed and that carries a buyer email and name can be sent. This is the first delivery only. An offer that has already been sent is refused with 422 `invalid_state`; use resend for any further delivery. Delivery is asynchronous. A 200 means the send was accepted and stamped on `last_buyer_notification_at` — it does not confirm the message reached the buyer. ## OpenAPI ````yaml /api-reference/commerce-v1.openapi.json post /v1/commerce/offers/{id}/send openapi: 3.0.3 info: description: >- Public REST API for COPE vendor integrations. Authenticate with a COPE API key or Clerk bearer token and call the endpoints described below. title: COPE Public API version: v1 servers: - description: Production url: https://api.cope.com security: - cope_sk: [] paths: /v1/commerce/offers/{id}/send: post: tags: - Offers summary: Send an offer to its buyer description: >- Delivers this offer's private checkout link to its buyer for the first time, and returns the offer. Only an `active` offer that has not lapsed and that carries a buyer email and name can be sent. This is the first delivery only. An offer that has already been sent is refused with 422 `invalid_state`; use resend for any further delivery. Delivery is asynchronous. A 200 means the send was accepted and stamped on `last_buyer_notification_at` — it does not confirm the message reached the buyer. operationId: sendCommerceOffer parameters: - description: id public identifier. example: of_A1b2C3d4E5f6 in: path name: id required: true schema: example: of_A1b2C3d4E5f6 pattern: ^of_[A-Za-z0-9]{12}$ type: string responses: '200': content: application/json: schema: additionalProperties: false properties: data: additionalProperties: false properties: buyer_profile: additionalProperties: false properties: address: additionalProperties: false properties: city: type: string line1: type: string line2: nullable: true type: string postal_code: type: string required: - city - line1 - line2 - postal_code type: object company_name: nullable: true type: string country: nullable: true type: string email: type: string first_name: nullable: true type: string last_name: nullable: true type: string locale: type: string phone: description: >- Buyer's phone number, as captured when the offer was created. nullable: true type: string state: nullable: true type: string type: type: string vat_id: nullable: true type: string required: - type - email - state - locale - vat_id - address - country - last_name - first_name - company_name type: object cancelled_at: nullable: true type: string cancelled_reason: nullable: true type: string created_at: type: string embed_origin: description: >- The one origin allowed to frame `embed_url`. Absent — not null — when the offer cannot be framed. pattern: ^https://[^@/?#\s]+$ type: string embed_url: description: >- Pass to the Checkout SDK's `mountCheckout` on `embed_origin` to open this offer's checkout inside your own page. The framed page waits for the SDK's mount handshake, so a bare iframe never loads. The same checkout `public_url` redirects to, not a second one. Absent — not null — when the offer cannot be framed. type: string expires_at: description: >- When the offer link stops working. Null when the offer never expires, which is what an offer created without `link_expiration` gets. nullable: true type: string id: example: of_A1b2C3d4E5f6 pattern: ^of_[A-Za-z0-9]{12}$ type: string last_buyer_notification_at: type: string next_resend_available_at: type: string order: additionalProperties: false nullable: true properties: id: example: ord_A1b2C3d4E5f6 pattern: ^ord_[A-Za-z0-9]{12}$ type: string required: - id type: object ordered_at: nullable: true type: string payment_plan_snapshot: additionalProperties: false properties: currency: type: string custom_plan_name: nullable: true type: string installment_count: nullable: true type: integer interval: nullable: true type: string interval_count: nullable: true type: integer plan_type: type: string price_minor_units: type: integer quantity: type: integer recurring_amount_minor_units: nullable: true type: integer second_payment_in: nullable: true type: integer shipping_price_minor_units: nullable: true type: integer trial_days: nullable: true type: integer required: - plan_type - currency - quantity - price_minor_units - shipping_price_minor_units - recurring_amount_minor_units - interval - interval_count - installment_count - second_payment_in - trial_days - custom_plan_name type: object product: additionalProperties: false nullable: true properties: id: example: prod_A1b2C3d4 pattern: ^prod_[A-Za-z0-9]{8}$ type: string name: type: string required: - id - name type: object public_url: type: string regeneration_eligible: type: boolean status: type: string required: - buyer_profile - cancelled_at - cancelled_reason - created_at - expires_at - id - last_buyer_notification_at - next_resend_available_at - order - ordered_at - payment_plan_snapshot - product - public_url - regeneration_eligible - status type: object required: - data type: object description: Successful response '400': content: application/problem+json: examples: unparsable_request: summary: Unparsable request value: code: invalid_request detail: >- The request could not be parsed. Check the query string and the request body. request_id: req_123 status: 400 title: Invalid Request type: https://docs.cope.com/errors/invalid_request schema: $ref: '#/components/schemas/PublicProblemDetail' description: Invalid request '401': content: application/problem+json: schema: $ref: '#/components/schemas/PublicProblemDetail' description: Missing or invalid bearer token '403': content: application/problem+json: schema: $ref: '#/components/schemas/PublicProblemDetail' description: Bearer token is not authorized for this route '404': content: application/problem+json: schema: $ref: '#/components/schemas/PublicProblemDetail' description: Resource not found '422': content: application/problem+json: examples: offer_send_invalid_state: summary: Offer cannot be sent in its current state value: code: invalid_state detail: cannot send offer in cancelled state errors: - code: invalid_state detail: cannot send offer in cancelled state request_id: req_123 status: 422 title: Invalid State type: https://docs.cope.com/errors/invalid_state offer_already_sent: summary: Offer has already been sent once value: code: invalid_state detail: offer has already been sent — use resend_to_buyer errors: - code: invalid_state detail: offer has already been sent — use resend_to_buyer request_id: req_123 status: 422 title: Invalid State type: https://docs.cope.com/errors/invalid_state schema: $ref: '#/components/schemas/PublicProblemDetail' description: The offer is not in a state this action allows security: - cope_sk: [] components: schemas: PublicProblemDetail: additionalProperties: false properties: code: type: string detail: nullable: true type: string errors: items: additionalProperties: false properties: code: type: string detail: type: string param: type: string required: - code - detail type: object type: array request_id: type: string status: type: integer title: type: string type: type: string required: - type - title - status - code - request_id type: object securitySchemes: cope_sk: description: >- Bearer credential for the public API. Vendor integrations should send a live COPE API key (`cope_sk_live_*`). Clerk bearer tokens are also accepted when paired with `X-Cope-Business-Id`. scheme: bearer type: http ````