Small tools for agents
that have to be trusted

Six services, each one narrow enough to understand in a minute: prove a fact without revealing it, check where an artifact came from, price a call by what it cost, enforce a mandate while it runs, remember across sessions, and check that a platform is real.

Python standard library where it can be. No accounts, no SDK, nothing to install. Payments per call over x402 on Base mainnet. Source: github.com/mrpkk

ṚTAZK proofsBase mainnet

Prove a balance, stake, account age or transaction count meets a threshold — the verifier learns only that it does, never the value. Five Groth16 circuits, zero public signals.

Price1 USDC per verification
attestProvenanceBase mainnet

Four layers: schema, is there anything inside, what conditions produced it, and was the action permitted. Ed25519-signed, and the check runs without trusting us.

Price20 free/day, then 0.005 USDC per call, or 9 USDC for 30 days prepaid
agentpayBillingLive

Price a call by what it actually consumed — tokens, CPU, bytes, writes, external calls — with the breakdown attached. A price table is a guess made once; this recomputes.

PriceFree preview
driftAgent trustBase mainnet

Continuous mandate enforcement for AI agents, as an MCP server. Checks the mandate at the moment of the action, so permissions that expire mid-session stop working mid-session.

Price100 free/day, then 0.005 USDC
indra-memoryLong memoryLive

Facts live in SQLite outside the context window; only a relevance-ranked sample enters the prompt. Context-bound memory degrades with length — the model cannot see the start of its own conversation.

PriceFree preview
verityDue diligenceLive

Three answers, not two: the site responds, the domain is a corporate root with the platform buried at a path, or it is dead. A responding domain is not a usable platform.

PriceFree
What these are not. ṚTA's ceremony is single-party, so a proof can be forged by the operator — that is a real limitation, not a footnote. attest's circuits are unaudited. agentpay's rate card is a demo and is reported as unverified until a source and a date are attached. verity's pass means the site responds, never that the operator is trustworthy.