---
title: "Start a new draft from an older version."
method: POST
path: "/templates/{id}/rollback"
tags: ["templates"]
---

# Start a new draft from an older version.

`POST /templates/{id}/rollback`

## Request

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

History is never rewritten; the live version stays until that draft is published.

## Path parameters

- `id` string, required: The template id or its alias.

## Headers

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

## Request body

- PostTemplatesByIdRollbackBody
  - `to_version` integer, required: The published version number to copy into a new draft.

## Response `201`

Success

- GetTemplatesByIdVersionsByNReply
  - `id` string, uuid, required
  - `template_id` string, uuid, required
  - `version_number` integer, required
  - `status` 'draft' | 'published', required
  - `content` union, required
    - object
      - `mode` 'block', required: block, markdown or html.
      - `blocks` union[], required: Blocks, in order. At least one.
        - union
          - object
            - `kind` 'text', required: A text block.
            - `body` string, required: The block text. Placeholders use {{name}}.
          - object
            - `kind` 'raw', required: HTML inserted as written.
            - `html` string, required: HTML for this block.
    - object
      - `mode` 'markdown' | 'html', required: markdown or html.
      - `source` string, required: The template source. At most 512 KB when writing.
  - `variables` object[], required
    - `name` string, required: Placeholder name, without the braces.
    - `type` 'string' | 'number' | 'boolean', required: string, number or boolean.
    - `required` boolean: A missing required value fails the render, unless preview is true.
    - `default` string: Used when the render call omits this name.
  - `subject` string, required
  - `from` string, nullable, required
  - `reply_to` string[], nullable, required
  - `text` string, nullable, required
  - `published_at` string, date-time, nullable, required
  - `rolled_back_from` integer, nullable, required
  - `created_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.
- `401`: No usable credential was sent. Codes: missing_api_key, session_required, mfa_required.
- `403`: The credential may not do this, or the account or key is stopped. Codes: sending_domain_blocked, young_domain_held, domain_sending_disabled, domain_not_verified, onboarding_recipient_not_a_member, onboarding_sender_unavailable, account_suspended, account_sandboxed, human_action_required, csrf_origin_rejected, charge_not_this_account, invalid_api_key, restricted_api_key, insufficient_role, invite_email_mismatch, domain_scope_violation, dedicated_ip_assigned_by_us, approval_required, staff_review_required, trust_paused, kill_switch_active.
- `404`: Nothing with this id exists on the account. Codes: billing_customer_missing, not_found, session_expired, support_ticket_not_found.
- `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)