ACME HTTP Connector · Certbot adapter

Publish HTTP-01 challenges and deploy your Certbot certificates through an HTTP API.

Documentation · Source code · Issues · Independent core

What it does

certbot-httpreq adds two plugins to Certbot. Together they connect certificate issuance and renewal to your existing HTTP services.

The project is now called ACME HTTP Connector. The package name, plugin names and configuration options are preserved for existing Certbot installations.

Installation

Requires Python 3.10+ and Certbot 2.11–5.x. Install in the same Python environment as Certbot; a separate pip environment does not extend a snap installation.

python -m pip install certbot-httpreq
certbot plugins

The independent acme-http-connector core is installed automatically.

Quick start

1. Configure your endpoints

Save the following as /etc/letsencrypt/certbot-httpreq.yml, replacing the example URLs with your own services:

perform:
  uri: https://api.example.com
  path: /challenges
  method: PUT
  format: json
  param_validation: value

cleanup:
  uri: https://api.example.com
  path: /challenges
  method: DELETE

deploy:
  uri: https://api.example.com
  path: /certificates
  method: POST
  format: json

TLS verification is enabled and the socket timeout is 30 seconds by default. Each section can override headers, timeout and verify independently.

2. Request a certificate

certbot run \
  --agree-tos --text --email admin@example.com \
  -a certbot-httpreq:auth \
  -i certbot-httpreq:installer \
  -d example.com

Your API must publish the challenge at http://example.com/.well-known/acme-challenge/<token>. The adapter also verifies it against the host in perform.uri and its explicit port, or Certbot's HTTP-01 port. That host must serve the challenge too.

3. Renew

certbot renew

Certbot invokes the configured plugins for challenge handling and certificate deployment. Deployment sends the first certificate name as domain and includes the complete certificate, including its additional names.

Use certbot renew --dry-run with a test API first: challenge publication and cleanup still make real HTTP requests.

Configuration

See the full configuration reference and complete example file. Use HTTPS for remote deployment and protect API credentials: certificate payloads include the private key.

Compatibility

Existing commands, plugin names, YAML settings and environment variables continue to work. Since version 0.0.21, the shared HTTP transport lives in the independent core package. Certbot handles ACME issuance; the connector handles your HTTP APIs.

Project

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Copyright © 2019–2026 Adrien Delle Cave. Licensed under GPL-3.0-or-later.