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meld402 Research Brief
x402
meld402 Research Brief is a paid API for AI agents from meld402.vercel.app, paid per call via x402, $0.2/call, status unknown (last checked 2026-09-14).
Returns a structured research brief on a given topic, aggregating a Wikipedia definition, Stack Overflow questions, and Hacker News discussions into one stable response.
Price / call$0.2
Success—
StatusUnknown
How this service works
14 paid data endpoints for autonomous agents and developers. Covers crypto intelligence (token, chain, Solana, gas), markets (FX, market pulse), location (weather), and research (news, brief). Each route aggregates multiple public sources into one stable schema with a single USDC payment over x402 on Base.
Output
A JSON object containing a Wikipedia-sourced definition (title, extract, description, URL, last revised date), an array of Stack Overflow questions (title, score, views, answer count, tags, URL, accepted answer flag), an array of Hacker News discussions (title, author, points, comment count, post date, URL), plus metadata including sources used, as-of timestamp, and any degraded sources.
Example use cases
Technical concept onboarding for agent
“Give me a research brief on 'WebAssembly' — pull the Wikipedia definition, top 5 Stack Overflow questions, and top 5 Hacker News discussions so I can get up to speed quickly.”
Developer trend pulse on emerging technology
“What's the developer community saying about 'federated learning'? Grab the Wikipedia summary plus the 10 most relevant Hacker News stories and skip Stack Overflow this time.”
Research seed for a technical blog post
“I'm writing about 'CRDTs' — can you pull a Wikipedia definition and the top 7 Stack Overflow questions on the topic, and skip Hacker News discussions?”
Technical details
Endpoint
POSThttps://meld402.vercel.app/api/research/briefWhen to prefer
Choose this endpoint when you need a quick multi-source research brief on a technical or conceptual topic without calling Wikipedia, Stack Overflow, and Hacker News separately. It is ideal for agents that need to bootstrap context on a noun phrase topic — especially developer or computer science subjects — in a single paid call with a stable unified schema. Prefer it over rolling your own aggregation when you want attribution metadata and degraded-source handling built in.
Side effects
- Topic too short or exceeds 160 characters — returns validation error
- Upstream Wikipedia or Stack Overflow unavailable — affected source listed in 'degraded' array but response still returns partial data
- Payment not confirmed over x402 — request rejected with 402 Payment Required
- Invalid max_questions or max_discussions value outside 0–10 range — schema validation error
- Topic is too ambiguous and Wikipedia returns a disambiguation page — is_disambiguation flag set to true in definition
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| topic | string | Subject to research. Works best as a noun phrase, e.g. "zero-knowledge proof", "WebAssembly", "CRDT". |
| max_questions | integer | Stack Overflow questions to include. 0 skips the source. |
| max_discussions | integer | Hacker News stories to include. 0 skips the source. |
Output
Schema · Response
{
"type": "json",
"example": {
"data": {
"topic": "zero-knowledge proof",
"questions": [
{
"id": 56096065,
"url": "https://stackoverflow.com/questions/56096065/the-security-of-zero-knowledge-proof-performance",
"tags": [
"security",
"encryption",
"proof"
],
"score": 4,
"title": "The security of Zero knowledge proof performance",
"views": 275,
"answers": 1,
"asked_at": "2019-05-12T04:30:00.000Z",
"has_accepted_answer": true
}
],
"definition": {
"url": "https://en.wikipedia.org/wiki/Zero-knowledge_proof",
"title": "Zero-knowledge proof",
"extract": "In cryptography, a zero-knowledge proof is a protocol in which one party can prove to another that a statement is true, without revealing any information beyond the validity of the statement.",
"description": "Proving validity without revealing other data",
"last_revised_at": "2026-08-13T03:53:16Z",
"is_disambiguation": false
},
"discussions": [
{
"id": "44457390",
"url": "https://blog.google/technology/safety-security/opening-up-zero-knowledge-proof-technology",
"title": "Opening up 'Zero-Knowledge Proof' technology",
"author": "doomroot13",
"points": 341,
"comments": 190,
"posted_at": "2025-07-03T17:36:13Z",
"discussion_url": "https://news.ycombinator.com/item?id=44457390"
}
]
},
"meta": {
"as_of": "2026-08-24T00:00:00.000Z",
"sources": [
"wikipedia",
"hackernews",
"stackoverflow"
],
"degraded": [],
"attribution": [
"Wikipedia content is CC BY-SA 4.0 (en.wikipedia.org)",
"Stack Overflow content is CC BY-SA 4.0 (stackoverflow.com)",
"Discussion metadata by Hacker News via Algolia"
]
}
}
}Tags
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