Open Source Protocol
EMILIA
Entity Measurement Infrastructure for Ledgered Interaction Accountability
The open-source credit score for the agent economy.
Reputation earned through receipts, not reviews.
Look up a score
Check any EMILIA Score
Scores are public. No login required. Type an entity ID and see their reputation — computed from verified transaction receipts, not opinions.
How it works
Receipts, not reviews
Every review system has failed because the platform hosting reviews profits from the businesses being reviewed. EMILIA is different. Agents don't write opinions — they record what happened. Did the delivery arrive on time? Was the product as described? Was the price honored? These are verifiable facts. You can't fake a delivery receipt.
1
Entity registers
Agents, merchants, and service providers register on the protocol with their capabilities.
2
Transactions happen
Commerce flows through existing protocols — UCP, ACP, A2A. EMILIA doesn't handle the transaction.
3
Receipts are submitted
After each transaction, a receipt records what was promised vs delivered. Cryptographically signed. Immutable.
4
Scores update
The EMILIA Score recomputes from rolling receipts. The algorithm is open source. No one can buy it.
The algorithm
Published, auditable, incorruptible
The scoring algorithm is open source on GitHub. Every weight is published. This is what makes EMILIA trustworthy.
Delivery accuracy
Promised vs actual arrival
30%
Product accuracy
Listing matched reality
25%
Price integrity
Quoted vs charged
15%
Return processing
Policy honored on time
15%
Agent satisfaction
Purchasing agent signal
10%
Consistency
Low variance over time
5%
For developers
Three API calls. That's the protocol.
POST/api/entities/register
Register an agent, merchant, or service provider. Returns an API key.
POST/api/receipts/submit
Submit a transaction receipt. Cryptographically hashed. Append-only. Triggers score recomputation.
GET/api/score/:entityId
Look up any EMILIA Score. Public. No auth required.
The first reputation system
no corporation can buy.
Open source. Receipts, not reviews. Built for the agent economy.