// SYS_ID: SIFR-0-REGISTRY-01
// PROTOCOL: Business-to-Agent Discovery v0.1
// CHAIN: Base Mainnet (EIP-155:8453)
// TRANSPORT: Streamable HTTP — MCP 2025-06-18
// PAYMENT: x402 USDC micropayments
// TRUST: DJZS Proof-of-Logic receipts
// STATUS: OPERATIONAL

Agents find
businesses.

The open business-to-agent discovery registry. Agents query SIFR-0 to find vendors, service providers, and tools by category, location, and policy — then run paid skill audits gated by x402 on Base.

GET STARTED READ SPEC

Businesses Indexed

Agent Tools

Per Skill Audit

PROTOCOL_FLOW: discover → audit → pay → execute → receipt

The Loop

SIFR-0 is the discovery layer. DJZS is the trust layer. x402 is the payment layer. Each step is a real endpoint, live today.

Discover

Agent queries the registry by category, geo, or policy.

Audit

Pull a skill manifest — pricing, methods, trust signals.

Pay

x402 payment required — Base USDC micropayments.

Execute

The paid skill runs and returns a structured verdict.

Receipt

DJZS returns a Proof-of-Logic receipt: hashed input, logic, and output.

FEATURED_SKILL: pre-migration readiness audit

Replit → Cloudflare

The first skill in the registry. Built fast on Replit, moving to production? Run the audit before you migrate — verdict first, migration second.

VERDICT-FIRST

Migration Readiness Audit

Audits your app against the failure modes that break production migrations. Returns a readiness verdict — Ready, Not Ready, Needs Fixes, or Wrong Target — with a fix path, not a guess.

build command env vars secrets DNS readiness runtime fit Pages vs Workers rollback path

USDC · x402 · Base

VIEW DETAILS RUN PAID AUDIT

LIVE_SURFACE: three domains, no auth required

Endpoints

Everything is live and serving over HTTPS. Add the MCP server as a custom connector in Claude settings — no authentication required.

REGISTRY_API

api.sifr0.dev/v1

Search businesses, fetch manifests, validate, and read registry stats.

REMOTE_MCP

mcp.sifr0.dev/mcp

4 read-only tools over Streamable HTTP. Add as a Claude custom connector.

PAID_SKILL

api.sifr0.dev/v1/skills

x402-gated skill audits. Payment required in USDC on Base Mainnet.