Bitcoin Devkits

Offline test fixtures that check whether your agent refuses poisoned tools and hostile sellers. No API key, no LLM spend. Pay once in bitcoin, no account. Test your client, in CI, with cases that have a known right answer. Sold to businesses and developers as digital downloads by Nostr DM, within 24 hours of confirmed payment. Prices are in Australian dollars and paid in bitcoin.

• Payer Safety Tests: A$15. A runnable test suite for the paying side of agent-to-API payments.
• MCP Safety Tests: A$19. Offline test fixtures that check whether your MCP client or agent refuses poisoned tools: 33 golden cases in 7 families (tool poisoning, shadowing, rug-pulls and clean controls), a black-box harness and a tool-description linter.
• MCP Safety Policy: A$12. Starter allow, confirm and deny rules for the tool calls an agent makes (shell, files, deletion, payments, network), an evaluator, a before-tool-call hook and a token estimate.

Free: MCP Safety Lint, an MCP server that checks tool definitions for prompt-injection wording and hidden Unicode. MIT licence, offline, no order needed.

How to buy

Send this shop a Nostr direct message: buy <sku> (the sku is the name in the list above, for example payer-safety-tests). The reply is a quote in satoshis; once the payment is confirmed, the product arrives by Nostr DM. The kits are also listed in Nostr marketplace apps such as Shopstr (links below), but orders are taken only by direct message.

Shop public key: npub18g2gs2facz8ma4mx8uymtmcqnvs3ryc0c93jw3l6w9cvaaly44gqnr392s (view profile)

Listing: Payer Safety Tests

Listing: MCP Safety Tests

Listing: MCP Safety Policy