toolgrep / AI agents & frameworks
Countersignatory
The going rate for a human minute
Visit countersignatory.com →Docs
A spot market and API for verified human judgment that AI agents can call when they should not act alone. Agents post a task with a maximum bid; a named, screened human answers within the deadline or the payment is refunded. Four tiers are offered: Check (one human), Consensus (several humans must agree), Countersign (a named professional with a registration), and Seal (a regulated act by a licensed partner). Includes a public spot index, quote engine, order API with x402 (USDC on Base) and card payment, and an MCP endpoint.
- Category
- AI agents & frameworks
- Pricing
- usage_based
- Free tier
- yes
- API
- yes
- MCP server
- yes
- SDK
- yes
- Open source
- unknown
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Listed 2026-10-25 · last verified 2026-10-25 · extracted by @cf/zai-org/glm-5.3-flash · confidence 0.9
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API
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