# FHIR R4 ValueSet List

> FHIR R4 ValueSet List 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).

Lists HL7 FHIR R4 terminology ValueSet resources from the public test server, returning a specified number of entries as a FHIR Bundle in JSON.

## Facts

- Endpoint: POST https://clonecho.builda.company/x402/s/fhir-valueset-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-r4-valueset-list-6f160fdd
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_QTSDtBoBcRWIMx8QRQ0fK

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-r4-valueset-list-6f160fdd -d '<json body>'
```

Example prompt: Can you pull a list of 10 ValueSet resources from the HL7 FHIR R4 terminology test server and show me what coding systems are available?

## When to prefer this

Use this endpoint when you need to browse or enumerate available FHIR R4 terminology ValueSet resources from the public HL7 test server, especially for healthcare interoperability, clinical coding, or exploring standard medical terminologies like SNOMED, LOINC, or ICD in FHIR format.

## Known failure modes

- Invalid or missing q parameter may return an error or empty bundle
- FHIR test server unavailability may cause timeouts or 5xx errors
- Very large q values may result in slow responses or truncated results
- Non-integer q parameter may cause a parsing error

## How this service works

List terminology value sets (ValueSet resources) from the public HL7 FHIR R4 test server, returning {q} entries as a FHIR Bundle. Query: ?q= Returns JSON.

## Output

A FHIR Bundle (JSON) containing the requested number of ValueSet resources from the HL7 FHIR R4 public test server, each describing a terminology value set with its codes, definitions, and metadata.

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/fhir-r4-valueset-list-6f160fdd/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)