Forms
Point any HTML form at a Plinth URL. Honeypot + heuristics. Store or forward. Open-source screener in @plinth/forms.
Nav station · open-core
Infrastructure under the thing you actually ship
Three bearings for solo builders: a form endpoint, a webhook inbox you can read, and JSON repair that survives LLM output. Free path works without an account. Paid is memory and limits.
Plotting sheet · Schema repair
Paste broken JSON (LLM prose, trailing commas, Python literals). Repair runs in your browser via
@plinth/schema. No account.
Three tools. One chart table.
Catch
Create a bin. Fire Stripe, GitHub, or your own webhook at it. Inspect headers and body. Replay on Pro.
Open Catch →Schema
Repair trailing commas, fences, Python literals, truncated braces — then validate against JSON Schema.
Open Schema →Dead reckoning · pricing
Free quotas on every product. Pro is $19/mo. Team is $49/mo. Polar handles tax and receipts. Annual = 10 months.
Full chart