---
title: "Mark a contact active again after they opt back in."
method: POST
path: "/contacts/{id}/resubscribe"
tags: ["contacts"]
---

# Mark a contact active again after they opt back in.

`POST /contacts/{id}/resubscribe`

## Request

- Base URL: `https://api.agentisend.com`
- URL: `https://api.agentisend.com/contacts/{id}/resubscribe`
- Auth: HTTP bearer

Requires consent_source and consent_at. Does not lift a spam report or a bounce.

## Path parameters

- `id` string, required

## Headers

- `Idempotency-Key` string
- `Resend-Idempotency-Key` string

## Request body

- PostContactsByIdResubscribeBody
  - `consent_source` string, required: Where the person opted back in.
  - `consent_at` string, date-time, required: When they opted back in, as UTC. Not in the future.

## Response `200`

Success

- PostContactsReply
  - `object` 'contact', required
  - `id` string, uuid, required
  - `email` string, required
  - `status` string, required
  - `first_name` string, nullable, required
  - `last_name` string, nullable, required
  - `unsubscribed` boolean, required
  - `properties` object, required
  - `property_types` object, required
  - `consent` object, required
    - `source` string, nullable, required
    - `at` string, date-time, nullable, required
    - `ip` string, nullable, required
    - `text` string, nullable, required
    - `double_opt_in_confirmed_at` string, date-time, nullable, required
  - `created_at` string, date-time, required
  - `updated_at` string, date-time, required

## Other responses

- `400`: The request is malformed or a field failed validation. Codes: validation_error, invalid_idempotency_key, invalid_cursor, plan_not_purchasable, stripe_signature_invalid, support_upload_rejected, sign_in_check_required.
- `409`: The request conflicts with the current state. Codes: domain_already_exists, template_name_taken, template_alias_taken, template_in_use, segment_in_use, contact_resubscribe_required, email_still_scheduled, domain_verified_elsewhere, domain_not_claimable, return_path_subdomain_in_use, overage_not_on_plan, term_not_on_sale, subscription_active, portal_change_unavailable, already_in_account, idempotency_in_flight, idempotency_payload_mismatch, approval_expired, support_closed, support_reopen_expired, support_merge_conflict, support_reply_too_soon.
- `413`: The request body is larger than this operation accepts. Codes: payload_too_large, support_upload_too_large.
- `415`: The request body is not JSON. Codes: unsupported_media_type.
- `429`: A rate, quota or ramp ceiling was reached. Codes: onboarding_daily_cap_reached, trust_throttled, invite_limit_reached, rate_ceiling_exceeded, daily_quota_exceeded, monthly_quota_exceeded, rate_limit_exceeded, support_rate_limited.
- `500`: Something failed on our side. Codes: internal_server_error.

---

[API](https://skmtc.dev/agentisend/apis/agentisend-api.md) · [All operations](https://skmtc.dev/agentisend/apis/agentisend-api/llms.txt) · [OpenAPI document](https://skmtc.dev/agentisend/apis/agentisend-api/revisions/3066dda62a56?raw)