$ sifr0 --version
SIFR-0 Protocol v0.1.0
STATUS: ACTIVE   REGISTRY: ONLINE   MANIFESTS: INDEXING
DJZS ECOSYSTEM // visibility layer
The open protocol that makes any business discoverable to AI agents.
Enterprise agents find tools inside the company.
SIFR-0 finds the businesses outside it.
Get API key View spec on GitHub See how it works

How it works

Businesses publish a JSON manifest at /.well-known/sifr0.json. Agents query the SIFR-0 registry to find them.

// /.well-known/sifr0.json
{
  "sifr0": "0.1",
  "entity": {
    "name": "NexusOps IT Solutions",
    "type": "professional_service",
    "category": ["managed-services", "cybersecurity"]
  },
  "services": [{
    "id": "managed-soc",
    "name": "24/7 Security Operations Center",
    "price": { "amount": 5000, "currency": "USD", "model": "monthly" },
    "booking": { "method": "api", "endpoint": "https://api.nexusops.io/v1/quotes" }
  }],
  "trust": { "verified": true, "licenses": ["SOC2-Type-II"], "djzs_trust_score": 870 }
}
// Agent searches the registry
const results = await fetch(`https://api.sifr0.dev/v1/search
  ?category=managed-services
  &near=37.77,-122.41&radius_km=50
  &policy.insurance=SOC2-Type-II`);
// Registry returns matching businesses
{
  "results": [{
    "name": "NexusOps IT Solutions",
    "verified": true,
    "distance_km": 12.4,
    "services_count": 3,
    "manifest_url": "https://nexusops.io/.well-known/sifr0.json"
  }],
  "total": 14
}

Enterprise use cases

Moveworks solved internal discovery. SIFR-0 solves external discovery.

HR
Agent needs a staffing agency

Onboarding agent searches SIFR-0 for pre-vetted contract staffing firms matching role requirements and budget.

IT
Agent evaluates MSPs

SLA monitoring agent finds SOC2-certified managed service providers within service area for vendor comparison.

Legal
Agent finds outside counsel

Contract review agent searches for M&A specialists with cross-border expertise and bar certification.

Facilities
Agent dispatches HVAC repair

Building maintenance agent finds licensed emergency HVAC contractors with 2-hour dispatch in range.

Procurement
Agent compares suppliers

Purchase order agent discovers and evaluates vendors by pricing, certifications, lead time, and API availability.

Facilities
Agent books corporate catering

Meeting room agent triggers catering search for 50-person lunch with dietary accommodations and same-day delivery.

Not competing. Complementary.

UCP
Shopping checkout
SIFR-0 covers the 80% that aren't retail
A2A
Agent-to-agent communication
SIFR-0 discovers the businesses agents talk to
MCP
Agent-to-tool connections
SIFR-0 registry exposed as MCP tools
llms.txt
Content for LLMs
SIFR-0 provides capabilities, not content

Endpoints

# Search businesses
GET  /v1/search?category=dentist&near=40.68,-73.97&radius_km=10

# Register a manifest
POST /v1/register  { "manifest_url": "https://..." }

# Get full manifest
GET  /v1/manifest/:id

# Validate a manifest
POST /v1/validate  { "sifr0": "0.1", "entity": {...}, "services": [...] }

# Registry stats
GET  /v1/stats

Search parameters

category         dentist, staffing-agency, hvac, managed-services
near            40.68,-73.97 (lat,lng)
radius_km       10
city            Brooklyn
type            local_business, professional_service, saas
q               free-text search on name + description
policy.insurance Aetna, SOC2-Type-II
policy.languages en, es, zh
verified        true (verified businesses only)

Get an API key

Free tier: 10,000 queries/month. No credit card. Ship first, pay later.

Part of the DJZS ecosystem

Can I find this business? → SIFR-0
Can I trust this business? → DJZS Protocol

SIFR-0 is the visibility layer. DJZS Protocol is the trust layer. Two protocols, one ecosystem.