Free access to the directory API and MCP server. Listing a new API costs $0.25 USDC from October 26, 2026, which includes one real purchase verification.
Key features
Live product data with pricing, availability, and seller information
Complete price history tracked hourly per seller
Customer reviews and ratings
Search with sorting and filters
REST API with predictable JSON responses
MCP server for AI agent integration
Support for multiple programming languages
Real USDC purchases to verify API delivery
Paid-verified status with Base blockchain transactions
Reputation scores from recency-weighted probe pass rates
Continuous endpoint probing every 2 minutes to 8 hours
Free discovery API with three-line pre-spend checks
MCP server integration with search and detail tools
Machine-readable catalogue in NDJSON format
Purchase outcome tracking and transaction visibility
Dispute resolution and result correction in public
Automatic payment address rotation detection
What makes it different
Full price history back to day one with per-seller granularity
Hourly price and stock tracking for every SKU
Only directory that pays with real USDC to verify delivery
Public ledger of all purchases and transactions on blockchain