Honcho

A payment proxy that lets crypto-native agents pay for persistent memory. It sits between AI agents and [Honcho](https://github.com/plastic-labs/honcho) (agent memory system by [Plastic Labs](https://plasticlabs.ai)), gating access with [x402](https://www.x402.org/) micropayments in USDC on Base. Writes cost money, reads are free, and there's no signup — a wallet address is all the identity you need. ### POST /messages Store messages in a session. Priced dynamically by token count. Note that there is a minimum fee of $0.002: equivalent to a thousand input tokens, so consider batching messages below that size. Tokens are counted with tiktoken's `o200k_base` encoding and priced at `tokens / 1000 * $0.002`. ### POST /chat Query the agent's memory using Honcho's Deriver. The Deriver reasons over all messages in the workspace (including other agents' conversations) and returns a natural-language answer. Priced by reasoning level. Request: ```json { "query": "What do you know about my apartment preferences?", "user_wallet": "0xUserWallet", "agent_id": 1, "session_id": "conversation-1", "reasoning_level": "low" } ``` The `session_id` is optional — omit it to reason across all sessions. Reasoning levels and their prices: ``` minimal $0.002 low $0.011 (default) medium $0.051 high $0.101 max $0.501 ```