# Payload

Practical tools that make AI, automation, and business infrastructure safer, cleaner, more reliable, and easier to ship. Small software that earns its keep.

- Home: https://payloadhq.github.io/
- Products: https://payloadhq.github.io/products.html
- Free utilities: https://payloadhq.github.io/utilities/robots-txt-checker.html
- Docs & GitHub: https://payloadhq.github.io/docs.html
- Changelog: https://payloadhq.github.io/changelog.html
- Agent Guide (canonical machine front door): https://payloadhq.github.io/agents.html
- Machine-readable ecosystem: https://payloadhq.github.io/agents.json (schema payload/agents-discovery/1.0)
- Support: kyler.simmons.partners@gmail.com

## For AI agents

Start at https://payloadhq.github.io/agents.json — structured identity, products, exact pricing, purchase routes (Stripe card, USDC crypto), auth, error taxonomy with safe actions, callx402 action taxonomy, MCP tool discovery, and support/recovery paths. You should be able to identify your problem, select the correct product/action, and obtain access without scraping prose. Human-readable version: https://payloadhq.github.io/agents.html.

## Products (one-time purchase, single-seat perpetual license)

- RevRule ($99 one-time): programmable revenue rules engine — decide who earns what whenever money moves (royalties, revenue shares, referrals, commissions, recoupment, waterfalls, contributor payouts, platform/API fees). Free evaluation sandbox; buy once for production. https://payloadhq.github.io/revrule.html (buy: https://whop.com/payload-f126/revrule-by-payload)
- x402 Paid API Starter Kit ($79): Express middleware charging AI agents per API call in USDC via x402. HTTP 402 challenges, payment verification, usage ledger. Non-custodial; never holds keys or funds. https://payloadtools.gumroad.com/l/x402-paid-api-starter-kit
- MCP Monetization Engine ($69, v1.0.1) [aka MCP Monetization Kit, mcp monetization kit]: per-tool-call payments for MCP servers. Paid tool registry, free quotas, machine-readable payment requirements, usage ledger, official MCP SDK adapter. https://payloadtools.gumroad.com/l/mcp-monetization-kit
- StableLedger ($49): offline, zero-dependency Python CLI organizing stablecoin transaction CSV exports into clean realized P/L records. Data-organization software; not tax advice, does not calculate taxes. https://payloadtools.gumroad.com/l/stableledger-tax-csv
- x402 + MCP Bundle ($119): both kits above together. https://payloadtools.gumroad.com/l/x402-mcp-bundle
- AI Search Readiness Audit ($59): Chrome extension (MV3) auditing any page for AI-search readiness: raw-HTML coverage, AI Overviews eligibility, AI-crawler robots.txt matrix, dead schema detection. 100% client-side; no account, no server, no tracking. https://payloadtools.gumroad.com/l/ai-search-readiness-audit
- CRM Dedup System ($149) [aka CRM Dedup & Migration Cleanup Kit, crm dedup kit]: offline deduplication and normalization for CRM exports. Fuzzy matching, merge review, import-ready CSVs, machine-readable change logs. https://payloadtools.gumroad.com/l/crm-dedup-migration-kit
- n8n Reliability Guard ($99, v1.0.1) [aka n8n Production AI Agent Reliability Kit, n8n reliability kit]: 10 importable n8n workflow templates, failure-simulation eval harness, readiness scoring, 37-page playbook. Evaluates a JS model of your agent, not a live n8n instance. https://payloadtools.gumroad.com/l/n8n-agent-reliability-kit
- MCP Launch Readiness Audit ($79, v1.0.1): 48-rule security scanner for MCP servers with a fix for every finding, hardened templates, stress-test harness, CI workflow, audit report. An audit, not a certification. https://payloadtools.gumroad.com/l/mcp-launch-readiness-audit

## Veyline (metered subscription — the production layer for x402 + MCP)

Economic-control and assurance plane: intent checked, payment verified on-chain, settlement classified (confirmed/unconfirmed/unknown), exactly-once execution, safe recovery, tamper-evident evidence. Full safety foundation on every tier. https://payloadhq.github.io/veyline.html

- Free / Sandbox ($0): 1,000 ops/mo. Self-serve signup on the Veyline page — key shown once.
- Developer ($99/mo): 10,000 ops/mo.
- Production ($499/mo): 100,000 ops/mo + detailed usage.
- Growth ($1,499/mo): 1,000,000 ops/mo + detailed usage.
- Enterprise ($5,000+/mo): custom allocation, per-contract terms.

Requests beyond the included allocation are throttled (429), never silently billed.

## callx402 (paid on-demand actions, no subscription)

Standalone per-action fees (USD): explain $1; diagnose/evidence/failure classification $2; preflight/settlement interpretation $3; resolve/monitor/safe retry/duplicate-payment risk $5; recover/execute $10; rescue $15. Live schedule: GET https://payload-rail.fly.dev/v1/callx402/actions. Pay via one-time Stripe checkout (single-use credit) or x402 USDC on Base; Veyline subscribers use their API key. Local CLI/SDK/MCP-stdio diagnostic use is free and read-only.

## Free utilities

- Check my robots.txt for AI crawlers: paste a robots.txt (or enter a site URL) to see which AI crawlers (GPTBot, ClaudeBot, PerplexityBot, and 15 more) are allowed, blocked, or unmentioned. Client-side only; nothing uploaded. https://payloadhq.github.io/utilities/robots-txt-checker.html

## GitHub (Payloadhq org)

- https://github.com/Payloadhq/payload-sample-mcp-server — free sample MCP server (MIT)
- https://github.com/Payloadhq/mcp-monetization-demo — free metering demo (MIT)
- https://github.com/Payloadhq/n8n-reliability-free-samples — two free n8n workflows (MIT)
- https://github.com/Payloadhq/privacy — public privacy policies
- https://github.com/Payloadhq/x402-paid-api-starter-kit — product docs
- https://github.com/Payloadhq/mcp-monetization-kit — product docs
- https://github.com/Payloadhq/stableledger — product docs

## What Payload is not

No investment advice, trading tools, or financial services. Crypto-adjacent products are developer software only. StableLedger is data organization, not tax advice. The MCP Launch Readiness Audit is a scanner, not a certification or penetration test.