Get a Substack author's full profile by handle, user ID or profile URL
Get a Substack author's full profile by handle, user ID or profile URL.
Answeringour last check, 2026-10-25
1 of 1checks answered this week
247 msmedian answer time
$0.004listed price per call
$0.004price it asked us
Paid test badge: not yet. The checks above are free: we call the tool without paying and read the payment request it sends back. The Verified badge needs paid calls whose answers match the promised output, and nobody can buy a badge.
Endpoint
GET https://x402.apidirect.io/v1/substack/user
| Category | Everything else |
|---|---|
| Provider host | x402.apidirect.io |
| Networks | eip155:8453 |
| Payment schemes | exact, upto |
| Self-reported calls, 30 days | 0 from 0 payers (the provider's figure, not ours) |
Our checks, last 30 days
| Day | Result | HTTP | Asked | Time |
|---|---|---|---|---|
| 2026-10-25 | valid payment request | 402 | $0.004 | 247 ms |
Example input (from the provider)
{
"method": "GET",
"queryParams": {
"username": "lenny"
},
"type": "http"
}
Promised output schema (from the provider)
{
"$schema": "https://json-schema.org/draft/2020-12/schema",
"properties": {
"input": {
"additionalProperties": false,
"properties": {
"method": {
"enum": [
"GET",
"HEAD",
"DELETE"
],
"type": "string"
},
"queryParams": {
"properties": {
"url": {
"description": "Profile URL, e.g. https://substack.com/@lenny (max 500 characters). Provide one of username, user_id or url.",
"maxLength": 500,
"type": "string"
},
"user_id": {
"description": "Numeric Substack user ID, as returned in user_id. Provide one of username, user_id or url.",
"type": "string"
},
"username": {
"description": "Substack handle, e.g. lenny, with or without a leading @ (max 100 characters). Provide one of username, user_id or url.",
"maxLength": 100,
"type": "string"
}
},
"required": [],
"type": "object"
},
"type": {
"const": "http",
"type": "string"
}
},
"required": [
"type",
"method"
],
"type": "object"
}
},
"required": [
"input"
],
"type": "object"
}