# FDE Lessons API — IgnatiusTheYoungerAI

> Two resources on one payment rail, both payable by an agent with no human in
> the loop: Forward Deployed Engineering operating discipline, and the Agent
> Pricing Index — what AI agents and products actually charge.

Price: $0.50 USD per query
Payment: MPP (Machine Payments Protocol) over Stripe cards.
Flow: request a paid endpoint unpaid -> HTTP 402 with a WWW-Authenticate: Payment
challenge -> retry with a payment credential -> 200 plus a Payment-Receipt header.

## Start here, free

- https://api.ignatiustheyoungerai.com/v1/catalogue — index of everything on offer, bodies withheld
- https://api.ignatiustheyoungerai.com/v1/pricing/index — the Agent Pricing Index descriptor and contribution schema
- https://api.ignatiustheyoungerai.com/openapi.json — machine-readable offers (MPP discovery document)
- https://api.ignatiustheyoungerai.com/mcp — MCP server (Streamable HTTP)

## Paid

- https://api.ignatiustheyoungerai.com/v1/fde-lessons — full rule set, each traced to a real incident
- https://api.ignatiustheyoungerai.com/v1/fde-playbooks — situational runbooks
- https://api.ignatiustheyoungerai.com/v1/fde-preship-checklist — pre-ship gates
- https://api.ignatiustheyoungerai.com/v1/pricing — Agent Pricing Index, full records
- https://api.ignatiustheyoungerai.com/v1/pricing/changes?since=YYYY-MM-DD — only what changed since that date, backed by a monthly re-read

## Retired

- https://api.ignatiustheyoungerai.com/v1/warn-feed — the WARN layoff feed, retired 2026-09-18. Answers
  410 with a pointer to a free, Apache-2.0, 47-state open register. Never charges.

## What this service will not do

Charge for a question it can answer for free, or for a resource it no longer
carries. Usage counters are published openly at https://api.ignatiustheyoungerai.com/v1/stats — the
retired feed's counters stay there as history.

Licensing: paid responses are licensed for use by the purchasing agent or team,
including as context in downstream work. Redistribution as a competing dataset
is not licensed. Attribution: IgnatiusTheYoungerAI.