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.
80000 (raw units)
price
3
calls / 30d
1
unique payers
2026-09-12
updated
Provider
x402.hydratrader.ai · discovered, not yet claimed by its owner
Payment (x402 accepts[])
[
{
"scheme": "exact",
"network": "eip155:8453",
"payTo": "0x55d06e282a699710e03088c218a9e79d2b1616fc",
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"amount": "80000",
"maxTimeoutSeconds": 300
}
]Output schema
{
"bazaar": {
"info": {
"input": {
"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"
},
"output": {
"example": {
"brief": {
"caveats": [
"Ecosystem evolving quickly; always check live facilitator docs"
],
"confidence": 0.78,
"headline": "x402 turns HTTP 402 into USDC micropayments for agents",
"key_points": [
"Server returns 402 with payment terms; client pays and retries",
"CDP Facilitator commonly used for verify/settle on Base",
"Bazaar indexes discoverable paid routes"
],
"summary": "x402 is an open payment protocol that uses HTTP 402 Payment Required so clients (including AI agents) can pay for web resources with stablecoins, commonly USDC on Base, via a facilitator that verifies and settles."
},
"citations": [
{
"published": null,
"publisher": "Coinbase CDP",
"snippet": "The x402 Bazaar is a catalog of payment-gated services discovered by the CDP Facilitator.",
"title": "x402 Bazaar (Discovery Layer)",
"url": "https://docs.cdp.coinbase.com/x402/buyer/discover-services"
}
],
"client_ref": null,
"endpoint": "research-brief",
"ok": true,
"usage": {
"floor_mult": 1.3,
"latency_ms": 6400,
"price_usdc": "0.08",
"sources_used": 3,
"token_cost_est_usdc": "0.05"
}
},
"type": "json"
}
},
"schema": {
"$schema": "https://json-schema.org/draft/2020-12/schema",
"properties": {
"input": {
"additionalProperties": false,
"properties": {
"body": {
"properties": {
"client_ref": {
"type": "string"
},
"depth": {
"default": "standard",
"enum": [
"quick",
"standard"
],
"type": "string"
},
"question": {
"maxLength": 500,
"minLength": 12,
"type": "string"
},
"scope": {
"properties": {
"domains_allow": {
"items": {
"type": "string"
},
"type": "array"
},
"domains_deny": {
"items": {
"type": "string"
},
"type": "array"
},
"max_sources": {
"default": 5,
"maximum": 8,
"minimum": 1,
"type": "integer"
},
"recency_days": {
"type": "integer"
}
},
"type": "object"
}
},
"required": [
"question"
]
},
"bodyType": {
"enum": [
"json",
"form-data",
"text"
],
"type": "string"
},
"method": {
"enum": [
"POST"
],
"type": "string"
},
"type": {
"const": "http",
"type": "string"
}
},
"required": [
"type",
"method",
"bodyType",
"body"
],
"type": "object"
},
"output": {
"properties": {
"example": {
"type": "object"
},
"type": {
"type": "string"
}
},
"required": [
"type"
],
"type": "object"
}
},
"required": [
"input"
],
"type": "object"
}
},
"builder-code": {
"info": {
"s": [
"cdp_sdk_server"
]
},
"schema": {
"$schema": "https://json-schema.org/draft/2020-12/schema",
"additionalProperties": false,
"properties": {
"a": {
"description": "App builder code",
"pattern": "^[a-z0-9_]{1,32}$",
"type": "string"
},
"s": {
"description": "Service builder codes",
"items": {
"pattern": "^[a-z0-9_]{1,32}$",
"type": "string"
},
"maxItems": 11,
"type": "array"
},
"w": {
"description": "Wallet builder code",
"pattern": "^[a-z0-9_]{1,32}$",
"type": "string"
}
},
"type": "object"
}
},
"eip2612GasSponsoring": {},
"erc20ApprovalGasSponsoring": {}
}Use it
curl
curl "https://x402.hydratrader.ai/v1/research-brief" # -> 402 Payment Required, accepts[] lists how to pay # retry with a PAYMENT-SIGNATURE (or PAYMENT header) once paid
JavaScript
const res = await fetch("https://x402.hydratrader.ai/v1/research-brief");
if (res.status === 402) {
const { accepts } = await res.json();
// pay one of accepts[] via an x402 client, then retry with the payment header
}Python
import httpx
res = httpx.get("https://x402.hydratrader.ai/v1/research-brief")
if res.status_code == 402:
accepts = res.json()["accepts"]
# pay one of accepts[] via an x402 client, then retry with the payment headerMachine-readable
Everything on this page is also available as clean JSON at /resources/8655.json, and this resource appears in /discovery/resources and /discovery/search.