# sigtap Outreach API
> Paid micro-API for outreach agents. One signature per call. No keys. x402 (USDC on Base).

## Endpoints
- GET /deliverability - $0.003: Email deliverability check: SPF, DKIM, DMARC and MX record audit for a sending domain
- GET /grade - $0.005: Cold email grader: score an email 0-100 with concrete fixes (subject line, body, spam risk)
- GET /template - $0.01: Cold email generator: personalized outreach email from proven templates (founder, agency, freelance)
- GET /tools/hash - $0.0005: Hash a string: sha256, sha512, sha1, md5, CRC32, base64 checksum - crypto hash API for UTF-8 text
- GET /tools/jwt-decode - $0.001: JWT decoder: decode a JSON web token header and payload, with safety flags (never verifies the signature)
- GET /tools/uuid - $0.0005: UUID generator: batch unique ids - UUIDv4, UUIDv7, ULID or nanoid - random ID API
- GET /tools/slug - $0.001: Slug generator: url-safe slug from unicode text, latin and Cyrillic transliteration
- GET /tools/json - $0.001: JSON tools: flatten JSON to dot paths, or convert JSON rows to CSV online
- GET /tools/regex - $0.001: Regex tester: test a regular expression - matches, groups, count and backtracking risk check
- GET /tools/crypto-price - $0.002: Crypto price API: BTC and ETH spot price from Coinbase with buy, sell and spread percent
- GET /tools/domain-age - $0.003: Domain age checker: registration date, age in days and registrar via RDAP lookup
- GET /tools/weather - $0.001: Weather API: current weather and next 3 hours temperature by lat, lon (open-meteo)

## Pay in one call (copy-paste)
Step 1: GET any paid path above -> 402 + PAYMENT-REQUIRED response header (base64 x402 v2 challenge: scheme exact, network eip155:8453, PayAI facilitator; payTo is inside the challenge).
Step 2: answer the challenge and retry the SAME GET; the easiest way is the official client (step 3) - it reads the challenge, signs an EIP-3009 transfer (USDC on Base) and sends X-PAYMENT for you.
Step 3 (copy-paste, one round-trip, no keys/accounts - wallet is the account):

```js
// npm i @x402/fetch @x402/evm viem
import { wrapFetchWithPaymentFromConfig } from "@x402/fetch";
import { ExactEvmScheme } from "@x402/evm";
import { privateKeyToAccount } from "viem/accounts";
const fetchWithPayment = wrapFetchWithPaymentFromConfig(fetch, {
  schemes: [{ network: "eip155:8453", client: new ExactEvmScheme(privateKeyToAccount(PRIVATE_KEY)) }]
});
const res = await fetchWithPayment(`${PAYBASE}/tools/uuid?count=3&version=v7`); // $0.0005
console.log(res.status, await res.json()); // 200 { ids: [...] }; settlement comes back in the payment-response header
```

Free check before any wallet action: GET https://sigtap-outreach-api.sigtap.workers.dev/preview/tools/uuid?version=v7 -> 200 truncated sample of the same output.
MCP twin (same tools over MCP): https://sigtap-mcp.sigtap.workers.dev/mcp - see its /llms.txt for a ready mcpServers config.

## Free
- GET / - this catalog (with prices)
- GET /score-preview?subject=... - free length/subject-only preview of the grader
- GET /hash-preview?text=... - free hash preview (sha256 + crc32), first 1000 chars; the paid /tools/hash has no length limit
- GET /preview/<paid-path> - free truncated sample of ANY paid tool (e.g. /preview/tools/hash?text=..., /preview/tools/uuid?version=v7)
- GET /health - liveness
- GET /openapi.json - full OpenAPI spec with x-payment-info

Buy the full kit: https://unnamedaiagent.github.io/pitchpilot-kit/