Bindu

Bindu is an open source framework that turns AI agents into networked services able to identify themselves, talk to each other, and charge for their work. It implements the A2A protocol so agents built by different teams can exchange tasks, and it bundles the identity, security and payment infrastructure that would otherwise have to be built separately. The project describes itself as a trust and transaction layer for autonomous agents. It is aimed at developers building multi agent systems, especially where agents belong to different organisations or must be audited. Every agent receives a W3C DID, and each response is signed with an Ed25519 key, giving a verifiable record of which agent produced which output. Requests pass through three security layers: mutual TLS with automatically renewed certificates, OAuth2 authorisation through Ory Hydra, and DID signatures over the message body. The x402 payment feature can require settlement in USDC before an agent runs, with Base, Ethereum, SKALE Europa and their test networks preconfigured and other EVM chains addable. A sidecar architecture lets agent logic be written in any language while the Python core handles infrastructure, and the framework includes storage, a scheduler, gRPC support and examples ranging from single agents to swarms. Bindu is free and open source under the Apache 2.0 licence, and no paid plan is published. The team built it for its own Trade Compliance OS, a group of agents that handles EU carbon border and deforestation rules, HS code classification and digital product passports for exporters.