--- description: HTTP status codes for certificate signing request API endpoints. title: Custom CSRs image: https://developers.cloudflare.com/og-docs.png --- [Skip to content](#main-content) > Documentation Index > Fetch the complete documentation index at: https://developers.cloudflare.com/cloudflare-for-platforms/llms.txt > Use this file to discover all available pages before exploring further. # Custom CSRs Last updated Aug 24, 2026|Copy as Markdown|[View as Markdown](https://docs-durable-objects-instance-replaced-errors.previews.developers.cloudflare.com/cloudflare-for-platforms/cloudflare-for-saas/reference/status-codes/custom-csrs/index.md)|[Agent setup](https://docs-durable-objects-instance-replaced-errors.previews.developers.cloudflare.com/agent-setup/) ## Success codes | Endpoint | Method | HTTP Status Code | | ----------------------------------------------------- | ------ | ---------------- | | /api/v4/zones/:zone\_id/custom\_csrs | POST | 201 Created | | /api/v4/zones/:zone\_id/custom\_csrs | GET | 200 OK | | /api/v4/zones/:zone\_id/custom\_csrs/:custom\_csr\_id | GET | 200 OK | | /api/v4/zones/:zone\_id/custom\_csrs/:custom\_csr\_id | DELETE | 200 OK | ## Error codes | HTTP Status Code | API Error Code | Error Message | | ---------------- | -------------- | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | | 400 | 1400 | Unable to decode the JSON request body. Check your input and try again. | | 400 | 1401 | Zone ID is required. Check your input and try again. | | 400 | 1402 | The request has no Authorization header. Check your input and try again. | | 400 | 1405 | Country field is required. Check your input and try again. | | 400 | 1406 | State field is required. Check your input and try again. | | 400 | 1407 | Locality field is required. Check your input and try again. | | 400 | 1408 | Organization field is required. Check your input and try again. | | 400 | 1409 | Common Name field is required. Check your input and try again. | | 400 | 1410 | The specified Common Name is too long. Maximum allowed length is %d characters. Check your input and try again. | | 400 | 1411 | At least one subject alternative name (SAN) is required. Check your input and try again. | | 400 | 1412 | Invalid subject alternative name(s) (SAN). SANs have to be smaller than 256 characters in length, cannot be IP addresses, cannot contain any special characters such as \~\`!@#$%^&\*()=+\[\] | | 400 | 1413 | Subject Alternative Names (SANs) with non-ASCII characters are not supported. Check your input and try again. | | 400 | 1414 | Reserved top domain subject alternative names (SAN), such as 'test', 'example', 'invalid' or 'localhost', is not supported. Check your input and try again. | | 400 | 1415 | Unable to parse subject alternative name(s) (SAN) - :reason. Check your input and try again. Reasons: publicsuffix: cannot derive eTLD+1 for domain %q; publicsuffix: invalid public suffix %q for domain %q; | | 400 | 1416 | Subject Alternative Names (SANs) ending in example.com, example.net, or example.org are prohibited. Check your input and try again. | | 400 | 1417 | Invalid key type. Only 'rsa2048' or 'p256v1' is accepted. Check your input and try again. | | 400 | 1418 | The custom CSR ID is invalid. Check your input and try again. | | 401 | 1000 | Unable to extract bearer token | | 401 | 1001 | Unable to parse JWT token | | 401 | 1002 | Bad JWT header | | 401 | 1003 | Failed to verify JWT token | | 401 | 1004 | Failed to get claims from JWT token | | 401 | 1005 | JWT token does not have required claims | | 403 | 1403 | No quota has been allocated for this zone. If you are already a paid Cloudflare for SaaS customer, contact your Customer Success Manager for additional provisioning. If you are not yet enrolled, [fill out this contact form ↗](https://www.cloudflare.com/plans/enterprise/contact/) and our sales team will contact you. | | 403 | 1404 | Access to generating CSRs has not been granted for this zone. If you are already a paid Cloudflare for SaaS customer, contact your Customer Success Manager for additional provisioning. If you are not yet enrolled, [fill out this contact form ↗](https://www.cloudflare.com/plans/enterprise/contact/) and our sales team will contact you. | | 404 | 1419 | The custom CSR was not found. | | 409 | 1420 | The custom CSR is associated with an active certificate pack. You will need to delete all associated active certificate packs before you can delete the custom CSR. | | 500 | 1500 | Internal Server Error | Was this helpful? YesNo ## On this page [![](https://docs-durable-objects-instance-replaced-errors.previews.developers.cloudflare.com/_astro/logo.te5VL_aD.svg)Docs](https://docs-durable-objects-instance-replaced-errors.previews.developers.cloudflare.com/) ```json {"@context":"https://schema.org","@type":"TechArticle","@id":"https://developers.cloudflare.com/cloudflare-for-platforms/cloudflare-for-saas/reference/status-codes/custom-csrs/#page","headline":"Custom Certificate Signing Requests · Cloudflare for Platforms docs","description":"HTTP status codes for certificate signing request API endpoints.","url":"https://developers.cloudflare.com/cloudflare-for-platforms/cloudflare-for-saas/reference/status-codes/custom-csrs/","inLanguage":"en","image":"https://developers.cloudflare.com/og-docs.png","dateModified":"2026-08-24","publisher":{"@type":"Organization","name":"Cloudflare","description":"One platform for your apps, agents, and workforce. 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