Research brief with citations, key points, and caveats from the public web
Research brief with citations, key points, and caveats from the public web. When to use: short cited answers for agent questions (fair-use snippets only — no full-text dumps). USDC on Base via x402 (cost-floored) — no API key.
Answeringour last check, 2026-09-24
1 of 1checks answered this week
675 msmedian answer time
$0.08listed price per call
$0.08price 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
POST https://x402.hydratrader.ai/v1/research-brief
| Category | Search and research |
|---|---|
| Provider host | x402.hydratrader.ai |
| Networks | eip155:8453 |
| Payment schemes | exact |
| Self-reported calls, 30 days | 3 from 1 payers (the provider's figure, not ours) |
Our checks, last 30 days
| Day | Result | HTTP | Asked | Time |
|---|---|---|---|---|
| 2026-09-24 | valid payment request | 402 | $0.08 | 675 ms |
Example input (from the provider)
{
"body": {
"depth": "quick",
"question": "What is the x402 protocol and how do agents pay for APIs?",
"scope": {
"max_sources": 3
}
},
"bodyType": "json",
"method": "POST",
"type": "http"
}
Promised output schema (from the provider)
{
"$schema": "https://json-schema.org/draft/2020-12/schema",
"properties": {
"input": {
"additionalProperties": false,
"properties": {
"body": {
"properties": {
"client_ref": {
"type": "string"
},
"depth": {
"default": "standard",
"enum": [
"quick",
"standard"
],
"type": "string"
},
"question": {
"maxLength": 500,
"minLength": 12,
"type": "string"
},
"scope": {
"properties": {
"domains_allow": {
"items": {
"type": "string"
},
"type": "array"
},
"domains_deny": {
"items": {
"type": "string"
},
"type": "array"
},
"max_sources": {
"default": 5,
"maximum": 8,
"minimum": 1,
"type": "integer"
},
"recency_days": {
"type": "integer"
}
},
"type": "object"
}
},
"required": [
"question"
]
},
"bodyType": {
"enum": [
"json",
"form-data",
"text"
],
"type": "string"
},
"method": {
"enum": [
"POST"
],
"type": "string"
},
"type": {
"const": "http",
"type": "string"
}
},
"required": [
"type",
"method",
"bodyType",
"body"
],
"type": "object"
},
"output": {
"properties": {
"example": {
"type": "object"
},
"type": {
"type": "string"
}
},
"required": [
"type"
],
"type": "object"
}
},
"required": [
"input"
],
"type": "object"
}