Search Substack posts by keyword across every publication
Search Substack posts by keyword across every publication.
Answeringour last check, 2026-10-25
1 of 1checks answered this week
270 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/posts
| Category | Search and research |
|---|---|
| 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 | $0.004 | 270 ms |
Example input (from the provider)
{
"method": "GET",
"queryParams": {
"query": "claude code"
},
"type": "http"
}
Promised output schema (from the provider)
{
"$schema": "https://json-schema.org/draft/2020-12/schema",
"properties": {
"input": {
"additionalProperties": false,
"properties": {
"method": {
"enum": [
"GET",
"HEAD",
"DELETE"
],
"type": "string"
},
"queryParams": {
"properties": {
"get_sentiment": {
"default": false,
"description": "Set to true to add AI emotion analysis (Plutchik's Wheel) to each result. Adds +$0.001 per request to the cost. Returns emotion scores, dominant emotion, intensity, and polarity.",
"type": "boolean"
},
"language": {
"description": "Two-letter language code, e.g. es, to rank posts in that language first",
"maxLength": 2,
"minLength": 2,
"type": "string"
},
"page": {
"default": 1,
"description": "Page number for pagination (1-101). Each page returns 16-20 posts.",
"maximum": 101,
"minimum": 1,
"type": "integer"
},
"posted_ago": {
"description": "Only return posts from this period: 24h (past day), 7d (past week), 30d (past month), or 12m (past year). Omit for all time. Any other value returns 400.",
"enum": [
"24h",
"7d",
"30d",
"12m"
],
"type": "string"
},
"query": {
"description": "Search keyword (max 500 characters)",
"maxLength": 500,
"type": "string"
}
},
"required": [
"query"
],
"type": "object"
},
"type": {
"const": "http",
"type": "string"
}
},
"required": [
"type",
"method"
],
"type": "object"
}
},
"required": [
"input"
],
"type": "object"
}