# ForeverBetter Biomarkers Derive

> ForeverBetter Biomarkers Derive is a paid API for AI agents from api.foreverbetter.xyz, paid per call via x402, $0.05/call, status unknown (last checked 2026-09-14).

Runs the biomarkers derive operation over specified source IDs in the paying wallet's private workspace, producing derived biomarker insights.

## Facts

- Endpoint: POST https://api.foreverbetter.xyz/biomarkers/derive
- Price: $0.05/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/foreverbetter-biomarkers-derive-fe8a8469
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_7DIbwSHLq4x9qLobAFqi3

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 foreverbetter-biomarkers-derive-fe8a8469 -d '<json body>'
```

Example prompt: Run the biomarkers derive operation on my workspace sources — use source IDs 'src_abc123' and 'src_def456' to compute my derived biomarker values.

## When to prefer this

Use this endpoint after importing and normalizing biomarker source data and before running analysis or generating recommendations — it is the derivation step in the ForeverBetter/Wellnizz pipeline that computes composite or derived biomarker values from raw sources. Prefer this over the analyze endpoint when you need to produce derived biomarkers first; choose it over the genetics derive analogue when working specifically with biomarker (lab/wearable) data rather than genomic data.

## Known failure modes

- Source IDs not found or not owned by the paying wallet — returns authorization or not-found error
- Invalid or empty source_ids array — returns validation error
- Source data not yet normalized or incompatible format — derivation may fail or return partial results
- Wallet payment insufficient or x402 payment not completed — request rejected
- Upstream source data missing required fields for derivation — returns processing error

## How this service works

Run the biomarkers derive operation over source IDs owned by the paying wallet.

## Output

Returns a derived biomarker dataset computed from the specified source IDs within the authenticated wallet's workspace, containing processed and synthesized biomarker values ready for downstream analysis or recommendation steps.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "required": [
  "input"
 ],
 "properties": {
  "input": {
   "type": "object",
   "required": [
    "type",
    "method",
    "bodyType",
    "body"
   ],
   "properties": {
    "body": {
     "required": [
      "source_ids"
     ],
     "properties": {
      "source_ids": {
       "type": "array",
       "items": {
        "type": "string"
       },
       "description": "Source IDs in the paying wallet workspace."
      }
     }
    },
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "POST"
     ],
     "type": "string"
    },
    "bodyType": {
     "enum": [
      "json",
      "form-data",
      "text"
     ],
     "type": "string"
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object"
    }
   }
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "id": "an_...",
  "status": "complete",
  "findings": []
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/foreverbetter-biomarkers-derive-fe8a8469/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from api.foreverbetter.xyz](https://www.zero.xyz/host/api.foreverbetter.xyz/llms.txt)