Agent & Infrastructure

Prompt injection detection and content moderation for AI agents: flags hidden instructions aimed at an LLM (none / suspicious / malicious + score) and harmful content (hate, violence, sexual, harassment, self-harm, illegal). Any language, JSON output.

Pay-per-call: MCP/API Error Rescue

Cryptographic SHA-256 hash & HMAC timestamp audit seal for AI agent actions

Ethereum read-only RPC and supported simulations. Submit method and params as JSON. Method schemas, limits and prices: https://api.block402.xyz/docs/api.md. Obtain a bound quote with a private Idempotency-Key before signing.

Bitcoin read-only RPC and supported simulations. Submit method and params as JSON. Method schemas, limits and prices: https://api.block402.xyz/docs/api.md. Obtain a bound quote with a private Idempotency-Key before signing.

Deterministic synthetic JSON or WireMock fixtures for ten commercial and four government APIs. Selected operations and realistic success/error scenarios, with source provenance.

Busca e resume os metadados de um LNURL-pay: limites de valor, se aceita comentário, se aceita zap Nostr (NIP-57) e se tem callback utilizável.

Confere a prova de pagamento do L402 em tempo constante: sha256(preimage) == payment_hash. É o teste que um servidor L402 precisa fazer.

O veredito L402 completo em uma chamada: decodifica a fatura, confere o preimage, e diz se o pagamento vale, quanto vale e se a fatura expirou.

Pay-per-call: Money Bot Research Brief

Pay-per-call: URL to Text

Create an email validation job from a JSON list of addresses or CSV text (send exactly one). Poll its status, then fetch results as JSON or CSV. Billing counts only testable addresses, fixed at creation; unreachable, disposable and typo domains are free.

x402 Payability Audit: probes an x402 endpoint and checks its 402 challenge (CAIP-2 network, canonical USDC asset, payTo checksum, amount, EIP-712 domain, resource URL, Bazaar discovery) with a fix for every failure

Pay-per-call: Codex Public Endpoint Snapshot

Create an email validation job from a JSON list of addresses or CSV text (send exactly one). Poll its status, then fetch results as JSON or CSV. Billing counts only testable addresses, fixed at creation; unreachable, disposable and typo domains are free.

Create an email validation job from a JSON list of addresses or CSV text (send exactly one). Poll its status, then fetch results as JSON or CSV. Billing counts only testable addresses, fixed at creation; unreachable, disposable and typo domains are free.

Create an email validation job from a JSON list of addresses or CSV text (send exactly one). Poll its status, then fetch results as JSON or CSV. Billing counts only testable addresses, fixed at creation; unreachable, disposable and typo domains are free.

Create an email validation job from a JSON list of addresses or CSV text (send exactly one). Poll its status, then fetch results as JSON or CSV. Billing counts only testable addresses, fixed at creation; unreachable, disposable and typo domains are free.

Order a data pipeline and receive a Docker image. Pay over x402. The image pulls data from a source such as weather, Google Drive or Confluence, stores it and serves the results to your agent over MCP. The platform builds and tests the image first and settles the payment after the test.

Decodifica uma fatura BOLT11 sem depender de biblioteca externa: payment_hash, valor em sats, descrição, validade, se já expirou e a rede.

UUIDs on demand: version 4 (random) or version 7 (time-ordered, sortable), up to 100 per call. Use it when an agent needs identifiers for records, requests or files, or a sub-cent call to test an x402 client end to end before buying anything larger.

When an agent has a USDC budget and N planned calls: can they afford the cheapest matching Bazaar tool? Cost planning, no execution.

Find a paid x402 tool for a capability: recommended endpoint + price + fallback. No execute.

Call before paying any x402 URL: fetch 402, normalize terms, PAY or BLOCKED. No money moved.