# Invoket — Authorised Nutrient Health Claims Lookup

> Invoket — Authorised Nutrient Health Claims Lookup is a paid API for AI agents from api.invoket.com, paid per call via x402, $0.001/call, status unknown (last checked 2026-09-14).

Returns the list of officially permitted health claims for a specified nutrient or substance, sourced from regulatory authorities with provenance data.

## Facts

- Endpoint: POST https://api.invoket.com/label/claims/permitted
- Price: $0.001/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/invoket-authorised-nutrient-health-claims-lookup-a203d560
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_PcLAg89d8G6eF_3qBmq2X

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 invoket-authorised-nutrient-health-claims-lookup-a203d560 -d '<json body>'
```

Example prompt: What health claims are officially permitted for vitamin D? I need the full list from official sources with provenance.

## When to prefer this

Use this endpoint when you need to verify or enumerate which health claims are legally permitted for a specific nutrient or substance under official food regulation — particularly before generating product labels, marketing copy, or compliance documentation. Prefer this over general web search when you need structured, provenance-backed regulatory data rather than informal summaries.

## Known failure modes

- 400 error if nutrient field is absent or empty
- No results returned if the nutrient string does not match a known normalised key (exact match required, no fuzzy search)
- Unexpected casing or punctuation may cause lookup misses despite normalisation step
- Nutrient not present in the regulatory database returns empty or null claims list

## How this service works

The checks your agent runs before it acts: verify a bank account, a phone number, a law in force, the weather or a vehicle — computed from official sources, with provenance in every response. You only pay for answers.

## Output

A structured response listing all officially authorised health claims for the queried nutrient or substance, including the normalised nutrient key used for the lookup and provenance information indicating the official regulatory source.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "required": [
  "nutrient"
 ],
 "properties": {
  "nutrient": {
   "type": "string",
   "description": "The nutrient or substance to list authorised claims for, required (absent or empty = 400). Queried after strict normalisation (case, punctuation, spacing); the response echoes the normalised key. This is the entry key - no fuzzy search"
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "object"
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/invoket-authorised-nutrient-health-claims-lookup-a203d560/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from api.invoket.com](https://www.zero.xyz/host/api.invoket.com/llms.txt)