# Vextorium Nostr Profile Lookup

> Vextorium Nostr Profile Lookup is a paid API for AI agents from api.vextorium.com, paid per call via x402, $0.003/call, status unknown (last checked 2026-10-20).

Fetches a Nostr user's profile (name, bio, picture, website, NIP-05, Lightning address) and latest public notes by querying multiple public relays, given an npub, hex key, or NIP-05 identifier.

## Facts

- Endpoint: POST https://api.vextorium.com/nostr-perfil-pago?utm_source=zero.xyz
- Price: $0.003/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-20
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/vextorium-nostr-profile-lookup-d77cdf25
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_NYFTd4S3GyRsgWMJ9rlgF

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 vextorium-nostr-profile-lookup-d77cdf25 -d '<json body>'
```

Example prompt: Can you look up the Nostr profile for npub1sg6plzptd64u62a878hep2kev88swjh3tw00gjsfl8f8lc2uqvspu3wwf and give me their name, bio, Lightning address, and their 5 most recent notes?

## When to prefer this

Use this endpoint when you need to resolve a Nostr identity (npub, hex, or NIP-05) into human-readable profile metadata and recent activity, especially when you also need the associated Lightning address. It aggregates across multiple public relays for higher reliability than querying a single relay directly.

## Known failure modes

- Unknown or invalid npub/hex/NIP-05 returns null profile fields
- NIP-05 domain DNS failure or server unavailability causes resolution error
- No relays return data for an obscure or new account
- Malformed input (invalid bech32 or hex) causes a validation error
- Rate limiting or relay unavailability may return incomplete notes

## How this service works

Nostr profile by npub, hex key or NIP-05 identifier (name@domain): name, bio, picture, website, NIP-05, Lightning address and latest public notes, queried from several public relays.

## Output

Returns a JSON object with the user's Nostr display name, bio/description, profile picture URL, website, NIP-05 address, hex public key, Lightning address, list of relays queried, profile last-updated timestamp, and an array of recent public notes each containing note ID, timestamp, and text content.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "notas": {
   "type": "integer"
  },
  "usuario": {
   "type": "string"
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/vextorium-nostr-profile-lookup-d77cdf25/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from api.vextorium.com](https://www.zero.xyz/host/api.vextorium.com/llms.txt)