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Nostr Follower Graph Fetcher
x402
Nostr Follower Graph Fetcher is a paid API for AI agents from nostr.halowerk.com, paid per call via x402, $0.004/call, status unknown (last checked 2026-09-15).
Fetches and deduplicates kind 3 contact lists for a Nostr public key across up to 12 relays, returning the authoritative follow list based on the highest created_at timestamp.
Price / call$0.004
Success—
StatusUnknown
How this service works
Fetches kind 3 contact lists over up to twelve relays. Because kind 3 is replaceable, several relays regularly hold different versions; only the one with the highest created_at is used and the answer states which relays carried that version and how many older versions were seen, so a stale relay never quietly overwrites a current list. At depth 1 the answer is the account and its outgoing follows.
Output
Returns the authoritative kind 3 contact list (highest created_at) for the queried public key, along with which relays carried that version, how many older/stale versions were encountered across the queried relays, and the follow list of outgoing contacts at the requested depth.
Example use cases
Audit follow list relay consistency
“For the Nostr pubkey npub1xtscya34g58tk0z605fvr788k263gsu6cy9x0mhnm87echrgufvs4gu434, check its kind 3 contact list across all available relays and tell me which relays have the authoritative latest version and how many older stale versions are floating around.”
Build social graph for a Nostr account
“I want to map the outgoing follows for the Nostr account with hex key 3bf0c63fcb93463407af97a5e5ee64fa883d107ef9e558472c4eb9aaaefa459d — can you fetch its depth-1 follower graph and list everyone it follows?”
Detect stale relay data for a pubkey
“Check if any relays are serving an outdated kind 3 contact list for npub180cvv07tjdrrgpa0j7j7tmnyl2yr6yr7l8j4s3evf6u64th6gkwsyjh6w6 and let me know how many relays have stale versions versus the current one.”
Technical details
Endpoint
POSThttps://nostr.halowerk.com/follower-graphWhen to prefer
Use this endpoint when you need the authoritative, deduplicated kind 3 follow list for a Nostr public key and want provenance information about which relays hold the latest version versus stale copies. It is the best choice when relay disagreement is a concern, as it explicitly resolves conflicts using created_at timestamps rather than blindly trusting a single relay.
Side effects
- Public key not found on any relay — returns empty or error
- All queried relays unresponsive — timeout or connection error
- Malformed public key input — validation error
- No kind 3 event exists for the given pubkey — empty contact list returned
- Relay consensus unavailable — partial results with degraded confidence
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| depth | integer | 1 returns the account and its follows. 2 also fetches the contact lists of its contacts. |
| pubkey | string | Public key as 64 hex characters, npub or nprofile. |
| relays | array | wss relay addresses. Left empty, ten measured default relays are used. |
| max_contacts | integer | Upper bound on contacts reported for the root account. |
| second_degree_sample | integer | How many contact lists to fetch at depth 2. Higher values cost time, not money. |
Tags
x402
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