← oblique.markets · all endpoints

POST /api/v1/paid/answer-with-sources — $0.65 per call

Use when an agent needs a cited answer it can show its principal rather than a bare completion. Returns Concise answer to a research question with cited sources, a confidence level and a disclaimer. $0.65.

Try it

curl -i https://api.oblique.markets/api/v1/paid/answer-with-sources
# → HTTP 402 with the exact payment requirements; pay, then retry with PAYMENT-SIGNATURE (x402) or Authorization: Payment (MPP)

Input schema

{
 "type": "object",
 "properties": {
  "question": {
   "type": "string",
   "description": "Question to answer with citations",
   "examples": [
    "What is the x402 payment protocol?"
   ]
  }
 },
 "required": [
  "question"
 ]
}

Example output

{
 "question": "What is the x402 payment protocol?",
 "answer": "x402 is an HTTP-native payment protocol: a server answers 402 with machine-readable terms, the client retries with a signed stablecoin payment, and a facilitator settles it on chain.",
 "sources": [
  {
   "title": "x402 protocol specification",
   "url": "https://github.com/coinbase/x402"
  }
 ],
 "confidence": "high",
 "disclaimer": null,
 "model": "deepseek/deepseek-v4-flash",
 "generated_at": "2026-09-12T00:00:00.000Z",
 "message": "Answer with sources via x402 protocol"
}

Clients

Worked TypeScript/Python clients and MCP configs: oblique-markets/oblique-examples · Agent Skills: oblique-markets/skills

Pay per call with x402 (USDC on Base or Solana) or MPP (pathUSD on Tempo). No accounts. Machine doors: /.well-known/x402.json · /openapi.json · /llms-full.txt · MCP · humans: remote.observer