Docs & GitHub
Everything public lives under github.com/Payloadhq. Free projects are MIT-licensed; product repos carry documentation and links to the paid kits.
Free & open source
payload-sample-mcp-server
Free sample MCP server on the official MCP Python SDK demonstrating per-tool-call x402 payments: unpaid callers get machine-readable payment requirements, paying callers get results, free tools stay free. Companion to the MCP Monetization Kit.
MIT Python MCPmcp-monetization-demo
Runnable demo of the metering mechanic behind the MCP Monetization Kit: per-tool-call metering with a free quota, then machine-readable PAYMENT REQUIRED. Stdlib Python only, hard-capped so it can't replace the paid kit.
MIT Pythonn8n-reliability-free-samples
Two production n8n workflows from the Reliability Kit (failure-alert dispatcher, HTTP timeout circuit breaker), import-ready with zero credentials required.
MIT n8nmcp-manifest-validator
Validate an MCP server.json manifest before you publish: required fields, name format, semver, transport declarations, and the common mistakes registries reject. Zero dependencies.
MIT Python MCPn8n-workflow-linter
Static lint for exported n8n workflow JSON: missing error handling, HTTP nodes without timeouts or retries, hardcoded secrets, trigger problems, dead nodes. Each finding names the node and the fix.
MIT Python n8ncsv-duplicate-inspector
Inspect a CSV for duplicate risk before a migration: exact-duplicate rows, key-column duplicates, near-duplicates. Streams large files instead of loading them.
MIT Python CSVmcp-readiness-check
Free GitHub Action: 10 MCP server readiness checks on every pull request — manifest validity, name format, semver, transport, secret heuristics. Use Payloadhq/mcp-readiness-check@v1.
Product documentation repos
- x402-paid-api-starter-kit — docs and checkout link for the x402 Paid API Starter Kit.
- mcp-monetization-kit — docs and checkout link for the MCP Monetization Kit.
- stableledger — docs and checkout link for StableLedger.
Privacy policies
Public privacy policies for Payload products: github.com/Payloadhq/privacy.
- AI Search Readiness Audit privacy policy — the extension is 100% client-side: no account, no server, no analytics, no tracking.
Support
Questions about any product: kylers.partners@gmail.com.