letstool/http2rdap repository overview

⁠http2rdap

Lightweight HTTP gateway that performs RDAP lookups through a JSON REST API.

Send a POST /api/v1/rdap request with a domain, IP address, or AS number — get a fully parsed RDAP record back as structured JSON. The authoritative RDAP server is discovered automatically via the IANA bootstrap registry (RFC 9224). Covers all TLDs, all RIRs, and AS number lookups.

The binary embeds a web UI and an OpenAPI 3.0 spec — no external files, no runtime dependencies.

⁠Quick start

docker run -p 8080:8080 letstool/http2rdap:latest

Open http://localhost:8080/⁠ to use the web UI, or query the API directly:

curl -s -X POST http://localhost:8080/api/v1/rdap \
  -H "Content-Type: application/json" \
  -d '{"domain":"example.com"}' | jq

⁠Configuration

CLI flags take priority over environment variables.

docker run -p 9090:9090 \
  -e LISTEN_ADDR=0.0.0.0:9090 \
  -e RDAP_TIMEOUT=30s \
  -e REQUEST_TIMEOUT=45s \
  letstool/http2rdap:latest

⁠Repo

https://github.com/letstool/http2rdap⁠

⁠License

This project is licensed under the Apache License, Version 2.0⁠.

Copyright (c) 2026 letstool.net

⁠See also