aptu.dev agent notes (see https://agentskills.io and the site skill at /skill.md)

Site: aptu.dev -- machine-payable API infrastructure for autonomous agents,
with paid API endpoints.

Allowed agent actions:
- Read and fetch the public landing page and any static asset.
- Fetch machine-readable discovery surfaces: llms.txt, llms-full.txt,
  /v1/openapi.json, /.well-known/x402, /.well-known/api-catalog,
  /.well-known/oauth-protected-resource,
  /.well-known/oauth-authorization-server, /auth.md,
  /.well-known/agent-auth.json, /.well-known/agent-skills/index.json,
  /skill.md, sitemap.xml, /v1/x401-probe.
- Call POST /v1/echo following the x402 v2 protocol: the first unpaid
  request returns HTTP 402 with a payment challenge; settle in USDC on Base
  and retry with the X-PAYMENT header.
- Call POST /v1/resume-eval the same way with a JSON
  `{resume_text, format, job_description?}` body; it scores a resume 0-4
  against an ATS rubric for $0.005 USDC on Base.
- Call POST /v1/agent-readiness the same way with a JSON `{domain}` body; it
  audits the domain's agent readiness (robots.txt, llms.txt, sitemap, feed,
  agents.txt, skill.md, JSON-LD, mcp.json, A2A card, x402 manifest, OpenAPI
  x-payment-info) and scores 0-100 for $0.05 USDC on Base.
- Call GET /v1/btc-regime the same way with query params
  `?spot=65000&closes=<7 daily closes CSV>`; it returns a bull/bear regime
  verdict against the 7-day MA (MA7, deviation pct, entry action) for
  $0.003 USDC on Base. Omit closes to read Kraken.

- Call GET /v1/x401-probe free; it answers 401 with a base64url PROOF-REQUEST
  header (x401 draft 0.2.0).

Rate limits:
- Public read surfaces: standard CDN caching applies; crawl politely.
- POST /v1/echo, POST /v1/resume-eval, POST /v1/agent-readiness, and GET
  /v1/btc-regime are metered paid endpoints (x402,
  USDC on Base); pricing
  and settlement recipient are declared in /.well-known/x402.

Notes:
- /skill.md is the canonical Agent Skill file for the site.
- This file is descriptive only. There are no allow/deny crawl directives
  here; see robots.txt for crawler policy.