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Paul Graham Researcher — Semantic Retrieval Endpoint
x402
Paul Graham Researcher — Semantic Retrieval Endpoint is a paid API for AI agents from paulgraham.researcher.now, paid per call via x402, $0.01/call, status unknown (last checked 2026-09-13).
Searches Paul Graham's complete corpus (essays, talks, interviews, X posts) by semantic + lexical query and returns grounded claim/quote/evidence packets with citations
Price / call$0.01
Success—
StatusUnknown
How this service works
Search Paul Graham's source corpus — a source-grounded persona of the Y Combinator co-founder and essayist, built from 13,000+ cited sources: his complete essays, talks, interviews, and X posts — by semantic + lexical query and retrieve grounded packets (graded claims, quotes, evidence with citations). POST a JSON body { query, limit? (<=100), packetTypes? }. Flat micro-price per query.
Output
Returns an array of grounded evidence packets, each containing a typed item (claim, quote, or fact), the verbatim or paraphrased text grounded to Paul Graham's corpus, and citation metadata pointing to the specific source (essay title, talk, interview, or X post). Up to 100 packets per call, defaulting to 20.
Example use cases
Startup advice fact-checking
“I'm writing an article about early-stage startup advice. Can you search Paul Graham's essays and talks for what he actually said about working with co-founders, and pull me 15 grounded quotes or claims with citations so I can verify each one?”
Investor pitch research
“I'm prepping for a YC interview. Search Paul Graham's full corpus for his views on what makes a great startup idea and return up to 20 claim packets — I want the actual cited evidence, not a summary.”
Content curation for a newsletter
“I'm putting together a newsletter on programming languages. Pull up to 10 packets from Paul Graham's essays and X posts specifically about Lisp or language design — quotes and facts only please, with sources.”
Technical details
Endpoint
POSThttps://paulgraham.researcher.now/v1/x402/entities/paul-graham/retrieveWhen to prefer
Use this endpoint when you need source-grounded, citable evidence from Paul Graham's actual writings rather than a generative summary. It is the right choice when accuracy and citation provenance matter — e.g. fact-checking, research, journalism, or building applications that must attribute claims to specific Paul Graham works. Prefer it over asking a general LLM, which may hallucinate quotes or misattribute sources.
Side effects
- Empty results if the query is too narrow or uses terms not present in the corpus
- Limit parameter exceeding 100 returns a validation error
- Missing required 'query' field returns a 400-level schema validation error
- Payment failure or insufficient USDC balance blocks the request via x402 protocol
- packetTypes filter with unrecognized type strings may return zero matching packets
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Tags
x402
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