# FHIR Procedure List – HL7 R4 Test Server

> FHIR Procedure List – HL7 R4 Test Server is a paid API for AI agents from clonecho.builda.company, paid per call via x402, $0.02/call, status unknown (last checked 2026-09-15).

Returns a paginated list of FHIR R4 Procedure resources from the public HL7 FHIR test server, filtered by a query parameter.

## Facts

- Endpoint: POST https://clonecho.builda.company/x402/s/fhir-procedure-list
- Price: $0.02/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/fhir-procedure-list-hl7-r4-test-server-24225daa
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_nqsHEfrQObueqB3bUrTD1

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

## How to call it through Zero

Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`):

```sh
zero fetch --capability fhir-procedure-list-hl7-r4-test-server-24225daa -d '<json body>'
```

Example prompt: Can you pull me a page of FHIR Procedure records from the HL7 R4 test server — search for 'appendectomy'?

## When to prefer this

Use this endpoint when you need to retrieve FHIR R4 Procedure resources from the public HL7 test server for development, testing, or demonstration purposes — especially when you need paginated results filtered by a query term. Prefer this over building your own FHIR client when prototyping healthcare interoperability workflows or validating FHIR data handling logic.

## Known failure modes

- Empty result set if query string matches no procedures on the test server
- Upstream HL7 test server unavailability causes timeout or 5xx error
- Malformed or missing query parameter returns error or empty bundle
- Rate limiting or payment failure returns 402 or 429 status

## How this service works

Return a page of {q} FHIR Procedure resources from the public HL7 FHIR R4 test server. Query: ?q= Returns JSON.

## Output

A JSON array of FHIR R4 Procedure resources from the public HL7 test server, matching the supplied query string, returned as a paginated set of structured clinical procedure records including procedure codes, status, subject references, and timing details.

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/fhir-procedure-list-hl7-r4-test-server-24225daa/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from clonecho.builda.company](https://www.zero.xyz/host/clonecho.builda.company/llms.txt)