Developers

Start building. Free forever. Apache-2.0.

MnemoPay is the trust OS for AI agents that handle money. Agent identity (Ed25519), Merkle-chained memory, six payment rails, agent credit score (300-850), EU AI Act Article 12 audit bundles. Live on npm + PyPI. 200K-operation stress-tested. Built solo, in the open. We build and dogfood our own tools: AugEngine is MnemoPay's flagship internal dogfood — the runtime behind a 12–20 min third-person narrative-action vertical slice that exercises our recall primitives in production. Read the brief.

Node / TypeScript

npm i @mnemopay/sdk

v1.12.1 latest. Subpath imports recommended — `@mnemopay/sdk/recall`, `/rails`, `/middleware/openai`, etc. Run the bundled MCP server explicitly with `npx @mnemopay/sdk`.

npm page →

Python

pip install mnemopay

v1.0.2 latest. Same API contract as the TS SDK for the core primitives (identity, memory, score, audit). Payment rails arrive in v1.1.

PyPI page →

MCP Server

npx -y --package=@mnemopay/sdk@latest mnemopay-mcp

Stdio MCP server bundled in the SDK. 95 tools available; 14 essentials exposed by default. Works with Claude Desktop, Cursor, Continue, or any MCP client. Filter via `MNEMOPAY_MCP_TOOLS=` env (groups: essentials, agent, all).

Hosted gateway →

16 modules

identity

Ed25519 keypairs + signed actions + verifiable receipts.

recall

Persistent agent memory. Local + remote, cosine similarity, deterministic.

anchor

Merkle-chained ledger. Tampering is cryptographically traceable.

rails

Stripe + Paystack + Lightning + Stripe MPP + x402 + Google AP2.

fiscal

FiscalGate. Reserves funds at charter start, enforces budgets pre-call.

charter

Agent employment contract. What the agent can spend, on what, for whom.

audit

EU AI Act Article 12-compliant bundles. Every tool call, payment, refusal.

score

Agent Reputation Score 300-850. Payment history + utilization + history length + behavior diversity + fraud record. Scores agents, not FCRA-regulated.

governance

Charter enforcement. Refuse / approve / escalate before the call.

middleware/openai

Drop-in memory + audit wrapper for the OpenAI SDK.

middleware/anthropic

Same for Anthropic. Same contract.

middleware/gemini

Shipped v1.11.0. Build-with-Gemini XPRIZE eligible.

middleware/cohere

Drop-in memory + audit wrapper for the Cohere SDK.

middleware/mistral

Drop-in memory + audit wrapper for the Mistral SDK.

langgraph

LangGraph-native node + state contract.

client

HTTP client for the hosted MnemoPay gateway. Use when you do not want to self-host.

Where to go next

Source code (GitHub) Apache-2.0. 155+ commits. CHANGELOG. Discussions open. Discussions (new) Ask questions, share what you are building. SDK deep-dive Module-by-module walkthrough with code samples. Docs API reference + brain.mnemopay.com knowledge graph. Pricing Self-hosted free · Pro managed $49/mo · Enterprise custom. Changelog What shipped, when, why.