# ArkAPI

> Bitcoin-native pay-per-call APIs for agents and developers. Live on the Signet test network only.

- Homepage: https://arkapi.dev/
- OpenAPI: https://arkapi.dev/openapi.json
- Agent manifest: https://arkapi.dev/.well-known/arkapi.json
- Full agent notes: https://arkapi.dev/llms-full.txt

## Authentication

- Create a session with `POST /v1/sessions`
- Fund the returned Signet Lightning invoice or Signet Ark address
- Use `Authorization: Bearer ak_xxx` on paid API calls

## Best agent tools

- `POST /api/dns-lookup`
- `POST /api/whois`
- `POST /api/ssl-check`
- `POST /api/headers`
- `POST /api/ip-lookup` returning geolocation, approximate location, ISP/ASN data, and a Google Maps link
- `POST /api/email-auth-check`
- `POST /api/axfr-check` for defensive DNS zone-transfer checking and exposed AXFR records when a nameserver is misconfigured
- `POST /api/domain-intel` for one-call domain intelligence with parsed `security.txt`, parsed `robots.txt`, improved tech fingerprinting, `http_behavior`, CT-log subdomains, and optional `ai_summary`
- `POST /api/hash-crack` for weak hash recovery using `fasttrack` mode over `md5`, `sha1`, `sha256`, or `ntlm`
- `POST /api/cve-search`
- `POST /api/prediction-market-search` for open Polymarket markets
- `POST /api/cve-lookup`
- `GET /api/btc-price` with optional `?currency=CAD` or `?currencies=USD,EUR,CAD`, returning market stats plus an Alternative.me `fear_greed` snapshot
- `POST /api/ai-chat`
- `POST /api/ai-translate`
- `POST /api/translate`
- `POST /api/screenshot`
- `POST /api/image-generate`

## URL to Markdown

- `POST /api/url-to-markdown` - 5 sats
- Provides clean extraction of web content for LLM context.

## Pricing model

- Pay per call in sats
- No standing account required
- Session funding is on Signet only in the current live deployment