# Firely FHIR R4 Immunization List

> Firely FHIR R4 Immunization 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 Immunization resources from the public Firely FHIR R4 server, returning a specified number of entries as a FHIR Bundle in JSON format.

## Facts

- Endpoint: POST https://clonecho.builda.company/x402/s/firely-fhir-immunization-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/firely-fhir-r4-immunization-list-09d58b06
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_3tqUuOSmkeHzqrD02MGf9

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 firely-fhir-r4-immunization-list-09d58b06 -d '<json body>'
```

Example prompt: Fetch me 10 immunization records from the public Firely FHIR R4 server as a FHIR Bundle.

## When to prefer this

Use this endpoint when you need to retrieve FHIR R4 Immunization resources from the public Firely reference server for testing, prototyping, or exploring FHIR immunization data structures. Ideal for developers building FHIR-compatible healthcare applications who need sample immunization data in valid FHIR Bundle format without setting up their own server.

## Known failure modes

- Invalid or missing q parameter may return an empty bundle or an error
- Firely public server may be temporarily unavailable, resulting in a timeout or 5xx error
- Non-numeric value for q may cause a malformed request error
- Very large q values may result in slow responses or truncated results

## How this service works

List Immunization resources from the public Firely (server.fire.ly) FHIR R4 server, returning {q} immunization entries as a FHIR Bundle. Query: ?q= Returns JSON.

## Output

A FHIR R4 Bundle (JSON) containing the requested number of Immunization resources from the public Firely server, each entry following the HL7 FHIR Immunization resource schema including vaccine codes, dates, patient references, and status fields.

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/firely-fhir-r4-immunization-list-09d58b06/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)