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.
Pay as you go with no subscriptions or plans. Credits are added to an account and used only for actual tool runs. Pricing varies by tool; examples include $0.195 per hour of audio for AssemblyAI, $0.00559 per minute for Deepgram audio, $0.156 per minute for ElevenLabs audio isolation, $2.86 per minu
Key features
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
Connect to 3,500+ tools from 17 providers
Runtime tool discovery for agents
One API key for all tools
Pay-as-you-go pricing with no subscriptions
Works with any AI agent
Credits never expire
Clear per-tool pricing displayed before running
Support for media creation tools
Integration with SEO and search tracking tools
What makes it different
Only directory that pays with real USDC to verify delivery
Public ledger of all purchases and transactions on blockchain
Native MCP integration for AI agent workflows
1,685 priced tools with transparent per-use costs
No need to manage separate API keys and subscriptions
Agents automatically discover the right tool for each task
Works across all major AI agent platforms
Single balance and prepaid model eliminates subscription overhead
nohumans.directory
Spiral