# av-hub-x402-gateway
x402 paid tools on Base mainnet USDC (eip155:8453).
MCP: https://api.defifintechdirectory.com/mcp
Send a request to a tool URL, read its HTTP 402 PAYMENT-REQUIRED challenge, then retry with PAYMENT-SIGNATURE.
Limits: 250 paid calls per UTC day overall; 60 per payer address. A concurrent request can be refused after signing.
- game_launch_kit: Build an original game planning bundle from a supplied brief. No competitor facts are invented. Price: 0.02 USDC. https://api.defifintechdirectory.com/tools/game_launch_kit
- store_art_prompt_pack: Generate bounded original store-art briefs for supplied aspect ratios. Price: 0.02 USDC. https://api.defifintechdirectory.com/tools/store_art_prompt_pack
- ship_gate_audit: Score a supplied release evidence checklist without fetching a URL or claiming legal compliance. Price: 0.02 USDC. https://api.defifintechdirectory.com/tools/ship_gate_audit
- text_sha256: Return the SHA-256 fingerprint of supplied UTF-8 text. No file fetching, identity check, or signature verification. Price: 0.001 USDC. https://api.defifintechdirectory.com/tools/text_sha256
- json_normalize: Parse JSON and sort object keys recursively. Returns an error for malformed JSON; no schema repair or semantic validation. Price: 0.005 USDC. https://api.defifintechdirectory.com/tools/json_normalize
- json_csv_convert: Convert bounded CSV with a header or a JSON array of flat string records. No spreadsheets, type inference, or nested objects. Price: 0.002 USDC. https://api.defifintechdirectory.com/tools/json_csv_convert
- url_normalize: Canonicalize a supplied HTTP(S) URL and remove common tracking parameters. Does not visit or validate the destination. Price: 0.005 USDC. https://api.defifintechdirectory.com/tools/url_normalize
- cron_next_utc: Calculate up to five next UTC times for a numeric five-field cron with wildcard day-of-month or weekday. No timezone, named fields, or delivery. Price: 0.001 USDC. https://api.defifintechdirectory.com/tools/cron_next_utc
- utm_url_build: Add source, medium, and campaign UTM parameters to an HTTP(S) URL. Does not test links or track visits. Price: 0.005 USDC. https://api.defifintechdirectory.com/tools/utm_url_build
- base64_text_codec: Encode UTF-8 text to base64 or decode strict base64 to UTF-8. No JWT inspection, binary files, or secret handling. Price: 0.001 USDC. https://api.defifintechdirectory.com/tools/base64_text_codec
- designer_pack: Download the Designer skill pack ZIP: book cover design, brand identity, premium spreadsheet and animation/VFX skills with example prompts, quick-start guide and licence. Price: 29 USDC. https://api.defifintechdirectory.com/packs/designer_pack
- marketer_pack: Download the Marketer skill pack ZIP: copy strategy, marketing experiments, story structure and video editing skills with example prompts, quick-start guide and licence. Price: 29 USDC. https://api.defifintechdirectory.com/packs/marketer_pack
- game_dev_pack: Download the Game Dev skill pack ZIP: game design, game feel/UX, level design, game programming, XR design and game audio skills with example prompts, quick-start guide and licence. Price: 39 USDC. https://api.defifintechdirectory.com/packs/game_dev_pack