v2.2.107-audit-builder-recommended-first-action / no-spend buyer-agent flow

Chat-native tiny x402 payment flow.

ApexScout gives buyer agents a small, clean way to prepare a one-cent paid request from chat: inspect proof, check safety, send the unpaid request, then retry with buyer-controlled x402 payment only when approved.

Score payment safety Generate Spend Passport Read JSON flow

First paid route

`/api/opportunity-check`

$0.01 on eip155:8453. Unpaid request should return HTTP 402 JSON before any paid retry.

Budget cap

10000

Buyer-side clients should cap the tiny payment to the listed amount and stop after one paid response.

Escalation

$5 audit builder

Use Agent Revenue Audit Builder only when the buyer wants deeper monetization guidance.

Expected flow

Start with a clear buyer-agent question.
Run no-spend safety and metadata checks first.
Send the same payload unpaid to /api/opportunity-check and inspect the HTTP 402 JSON.
Retry with a buyer-controlled x402 client only when the buyer approves the spend.
ApexScout verifies and settles on Base mainnet x402, then returns HTTP 200 JSON.
Escalate to the $5 Agent Revenue Audit Builder only when monetization guidance is worth the higher spend.

Sample payload

{
  "subject": "Example API or company",
  "goal": "Decide whether this is worth a deeper review.",
  "buyerType": "buyer-agent",
  "source": "chat-tiny-payment-flow"
}

Unpaid probe

curl -i -X POST "https://agent-research-brief-api-production.up.railway.app/api/opportunity-check" \
  -H "content-type: application/json" \
  --data '{
  "subject": "Example API or company",
  "goal": "Decide whether this is worth a deeper review.",
  "buyerType": "buyer-agent",
  "source": "chat-tiny-payment-flow"
}'

Buyer-side command shape

Do not run unless the buyer wallet is approved for this spend.
npx awal@latest x402 pay "https://agent-research-brief-api-production.up.railway.app/api/opportunity-check" \
  -X POST \
  -h '{"Content-Type":"application/json"}' \
  -d '{
  "subject": "Example API or company",
  "goal": "Decide whether this is worth a deeper review.",
  "buyerType": "buyer-agent",
  "source": "chat-tiny-payment-flow"
}' \
  --max-amount 10000 \
  --json

Guardrails

Free page and API only.
No paid call is made by this builder.
No paid upstream service is called.
No wallet custody or automatic spending is added.
No public buyer prompts, wallet histories, raw paid responses, or raw feedback are exposed.
No outreach, posting, DMs, email, scraping, or third-party discovery is recommended.
No revenue outcome is guaranteed.
No third-party tiny-payment product affiliation or endorsement is claimed.

Metadata Preflight · Search Fit Lab · x402 proof · MCP Tool Pack · Machine-readable docs