# FHIR DocumentReference List (HL7 R4 Test Server)

> FHIR DocumentReference 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 DocumentReference resources from the public HL7 FHIR test server, queried by a search term.

## Facts

- Endpoint: POST https://clonecho.builda.company/x402/s/fhir-document-reference-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-documentreference-list-hl7-r4-test-server-a95db2d5
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_OQs5DrSsMS8UBuSKvTWvD

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-documentreference-list-hl7-r4-test-server-a95db2d5 -d '<json body>'
```

Example prompt: Can you pull a page of FHIR DocumentReference resources from the HL7 R4 public test server — search for 'discharge summary' and give me the results as JSON?

## When to prefer this

Use this endpoint when you need to fetch or test FHIR R4 DocumentReference resources from the public HL7 test server, particularly for healthcare interoperability prototyping, FHIR integration testing, or exploring clinical document reference structures without standing up your own FHIR server.

## Known failure modes

- Empty result set if query term matches no DocumentReference resources on the test server
- Malformed or missing 'q' parameter may return an error or unfiltered results
- Upstream HL7 public test server downtime can cause request failures
- Rate limiting or payment validation failure may block the request (x402 protocol)

## How this service works

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

## Output

A JSON-formatted FHIR R4 Bundle containing a page of DocumentReference resources matching the query, including document metadata such as identifiers, status, type, subject references, and content attachments, sourced from the public HL7 FHIR test server.

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/fhir-documentreference-list-hl7-r4-test-server-a95db2d5/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)