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SAMVAD — Secure Agent Messaging, Verification And Discovery samvad (संवाद) — Sanskrit for “dialogue between parties.” SAMVAD is an open protocol for AI agents on the public internet to discover each other, verify each other’s identity, and exchange typed messages — with no central authority, no platform sign-up, and a ten-minute path from zero to a working agent.

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The core idea

An agent’s identity is its domain. If you can host a JSON file at /.well-known/agent.json and serve HTTPS, you’re on the network — no accounts, no registry gate required. 
agent://myagent.com  →  https://myagent.com
Every message is signed with an Ed25519 key declared in the agent card. The receiver verifies the signature, checks the nonce for replay, enforces rate limits, validates the input schema, and enforces the skill’s trust tier — all automatically if using a compliant SDK.

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What SAMVAD gives you

Secure by default

Eight security layers enforced automatically: signing, replay protection, rate limiting, input validation, injection scanning, delegation scope, key rotation, and audit trails.

Three communication modes

Sync request/response, async with webhook callback, and SSE streaming — all over the same signed envelope format.

Self-sovereign identity

Your domain is your identity. Standard web PKI — no new infrastructure, no accounts, no API keys to establish who you are.

Language-agnostic spec

Protocol is wire-format only. A TypeScript SDK ships today; any language that can do HTTPS and Ed25519 can implement it.

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What SAMVAD is not

  • Not an orchestration engine. Workflow runtimes and multi-step pipelines are built on top of SAMVAD, not in it.
  • Not a billing system. The protocol provides trust tiers; how you charge for access is your product.
  • Not a discovery gate. You can call any agent whose domain you know without any registry. A public registry is live at samvadprotocol.vercel.app/registry for optional discovery, but participation is never required.

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Protocol status

Pre-1.0. Protocol version 1.2. The spec is stable; the TypeScript SDK is feature-complete for the core protocol. APIs may change before 1.0.

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Next steps

Quick Start

Build and call your first SAMVAD agent in under 5 minutes.

Protocol Spec

Read the full language-agnostic protocol specification.