Discovery. How does an agent find out what your API can do? Today: read your docs (if they're good), or have a developer hard-code the integration. Neither scales. Agents need machine-readable capability advertisements — what endpoints exist, what they cost, what authentication they require, what formats they accept.

Google's A2A protocol defines exactly this: a JSON document at /.well-known/agent.json that describes your API's capabilities in a format agents can parse and reason about. Think robots.txt, but for capabilities instead of restrictions.

Visibility. You can't manage what you can't measure. Right now, agent traffic is invisible — mixed in with your regular API metrics, indistinguishable from automated scripts. You don't know which agents convert, which ones fail, what they're trying to do, or how much revenue they drive.

This is the visibility gap. You need to understand your agent traffic the same way you understand your human traffic — which agents are calling, what's succeeding, what's failing, and where the bottlenecks are.

The Agent Gateway Pattern

Each of these problems has an emerging standard. The challenge is implementation. Most teams don't want to read IETF drafts, implement payment verification, serve A2A cards, and build analytics pipelines. They want to add a middleware and move on.

That's the agent gateway pattern: a single integration point between your API and agent traffic that handles identity, payment, discovery, and analytics. Think of it like CORS middleware — you add one line, and a whole class of problems disappears.

// Express
import { agentLayer } from '@lightlayer/agent-layer-express';
app.use(agentLayer({
  identity: { trustedIssuers: ['https://auth.anthropic.com'] },
  payments: { facilitator: 'https://x402.org/facilitator' },
  a2a: { name: 'My API', capabilities: [...] }
}));

# FastAPI
from agent_layer.fastapi import configure_agent_layer
configure_agent_layer(app,
  identity={"trusted_issuers": ["https://auth.anthropic.com"]},
  payments={"facilitator": "https://x402.org/facilitator"},
  a2a={"name": "My API", "capabilities": [...]}
)

That's it. Your API now verifies agent identity, accepts micropayments, advertises capabilities, and logs agent traffic — all through standards that every major AI lab is converging on.

Why Now

The standards are crystallizing. x402 launched. Google published A2A. The IETF agent auth draft is circulating. In six months, this won't be a question of "should we support agents?" but "why don't we already?"

The APIs that implement agent gateways first will capture the agent traffic. The rest will be invisible to the agentic web — the way sites without HTTPS became invisible to modern browsers.

We're building agent-layer as open-source middleware for Express, Koa, FastAPI, Flask, and Django. The dashboard for monitoring and analytics is coming soon.

If you're building an API that agents should be able to use, talk to us.

— Isaac and Mus