Marketplace · API · x402

paulgraham.persona.energy/v1/x402/entities/paul-graham/retrieve

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.

Endpoint	`https://paulgraham.persona.energy/v1/x402/entities/paul-graham/retrieve`
Trust	100% uptime over 1 checks · ~234 ms
Pricing	Pay per call with x402, no account. Call it to get an exact quote before paying.
network	eip155:8453
scheme	exact
pay to	0x45A4A9612D4d4E78703A63dC3eF36267A6c17D96
method	POST
last updated	2026-10-23T23:32:55.036Z

Use it

Call it (an x402 client pays automatically)

curl -i https://paulgraham.persona.energy/v1/x402/entities/paul-graham/retrieve
# 402 reply -> sign PAYMENT-REQUIRED with an x402 client (e.g. @x402/fetch) -> retry with PAYMENT-SIGNATURE

This listing as JSON

curl https://aipaygen.com/v1/catalog/api/x402-f4c364e34dede0f6

Search the whole marketplace from your agent (MCP)

{
  "mcpServers": {
    "aipaygen": {
      "url": "https://aipaygen.com/mcp"
    }
  }
}