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Vextorium Nostr Profile Lookup
x402
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 2026-10-19).
Fetches a Nostr user's profile (name, bio, picture, website, NIP-05, Lightning address) and latest public notes by npub, hex key, or NIP-05 identifier, queried across multiple public relays.
Price / call$0.003
Success—
StatusUnknown
How this service works
558 pay-per-call data APIs for AI agents: Solana and EVM on-chain data, tokenized stocks, DeFi, Hyperliquid, economy and official statistics, FX, validation, web and developer tools. Pay in USDC via x402.
Output
Returns a JSON object with the user's display name, NIP-05 handle, bio/description, profile picture URL, website, hex public key, Lightning address, list of relays they use, source attribution, profile last-updated timestamp, and an array of recent public notes (each with ID, timestamp, and text content).
Example use cases
Resolve NIP-05 identity for contact
“Can you pull up the Nostr profile for jb55@jb55.com? I want their display name, bio, website, and Lightning address.”
Fetch latest notes from Nostr account
“Get me the last 10 public notes from the Nostr account with npub1xtscya34g47wc4g2t86er7k05h5kalfj76v5fzpj8mv9a66rr4ysgwh87k — I want to read what they've been posting.”
Enrich npub with full profile metadata
“I have a Nostr hex key 3bf0c63fcb93463407af97a5e5ee64fa883d107ef9e558472c4eb9aaaefa459d — can you resolve it to a full profile including their name, picture, and any Lightning address?”
Technical details
Endpoint
POSThttps://api.vextorium.com/v1/nostr-profile?utm_source=zero.xyzWhen to prefer
Use this endpoint when you need to resolve a Nostr identity (npub, hex key, or NIP-05 address) into human-readable profile data including bio, picture, website, and Lightning address, or when you need a user's recent public notes aggregated from multiple relays in a single call. Prefer this over manual relay queries when you want multi-relay aggregation without managing WebSocket connections yourself.
Side effects
- User not found on any queried relay — returns null or empty profile fields
- Invalid or malformed npub/hex key/NIP-05 causes lookup failure
- NIP-05 domain is unreachable or DNS lookup fails
- No recent notes available if user has never posted
- Relay connectivity issues may result in incomplete or stale data
- Rate limiting or payment failure returns 402 or error response
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| user | string | |
| notes | integer |
Output
Schema · Response
{
"type": "json",
"example": {
"web": "https://stuff.fiatjaf.com/",
"name": "fiatjaf",
"user": "fiatjaf",
"image": "https://fiatjaf.com/static/favicon.jpg",
"nip05": "_@fiatjaf.com",
"relays": [
"wss://relay.damus.io",
"wss://nos.lol"
],
"source": "Public Nostr relays",
"key_hex": "3bf0c63fcb93463407af97a5e5ee64fa883d107ef9e558472c4eb9aaaefa459d",
"lightning": null,
"last_notes": [
{
"id": "9dcca686f269e363401c074037c533f65935ea4bc86864dce03a6fc888d8b057",
"date": "2026-10-02T03:03:58+00:00",
"text": "Can this work with the identity key not being local on the app, but only in a very far away and slow bunker?\n\nHow does the content key get shared between apps/devices? Or each device has its own?"
},
{
"id": "d866431be3fa48288ea0109ae735fa9e5c13c778a2113dcae7abc61d0f071ee8",
"date": "2026-10-02T03:02:22+00:00",
"text": "What do we have more on Nostr?\n\n1) users\n2) DM standards\n3) slop websites\n4) relay implementations by nostr:npub1937vv2nf06360qn9y8el6d8sevnndy7tuh5nzre4gj05xc32tnwqauhaj6 https://nostr.download/5eeb37e75e67e2a1c5f183a2956f0b6cd072cf4fdba469e2a3346a3e3c448855.png"
}
],
"description": "boa idéia, já que eu também tinha pensado",
"nip05_queried": null,
"updated_profile": "2026-09-11T14:52:27+00:00"
}
}Tags
x402
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