Dexter Launches ERC-8004 Trust Layer for AI Agents
Dexter implements the ERC-8004 standard for trustless AI agents across Base and Solana. On-chain identity NFTs, reputation tracking, facilitator attestations, and 7 new MCP tools – all with gasless operations.
Dexter Launches ERC-8004 Trust Layer for AI Agents
FOR IMMEDIATE RELEASE
Full Implementation of the Trustless Agent Standard – On-Chain Identity, Reputation, and Payment Attestations
Verifiable identity. Portable reputation. Cryptographic proof of settlement.
What Is ERC-8004?
ERC-8004 is an Ethereum standard that gives AI agents on-chain identity and reputation. Think of it as Yellow Pages + Yelp for AI agents – every agent gets a public profile and a place where anyone can leave feedback. Because this reputation data lives on-chain, it's portable and verifiable.
Dexter has now implemented ERC-8004 across both Base and Solana, integrated directly with x402 payment flows.
Talk is cheap. This is running in production.
What Dexter Built
On-Chain Agent Identity
Base (EVM)
- ERC-721 Identity Registry:
0x55e75bA0f87c59fC4fE4231892bfc805C21C5E0f - Non-transferable (soulbound) identities
- Metadata stored on IPFS via Pinata
Solana
- Full SATI SDK integration (Cascade Protocol)
- Compressed NFT identity tokens
- ~$0.0001 minting cost via state compression
Both Chains
- On-demand identity minting via MCP tools or API
- Agent Registration Files following ERC-8004 spec
Reputation System
- Reputation Registry:
0x061959e70fB718D7891027283afbfE2875696B6E - Feedback with value (0-100), tags, and optional detailed URIs
- Bidirectional ratings (buyer rates seller, seller rates buyer)
- Background worker processes feedback queue every 60 seconds
- Batch submission reduces gas costs by ~90%
Facilitator Attestations
- Cryptographic proof of payment settlement
- Ed25519 signatures (Solana) and secp256k1 signatures (Base)
- Attestation includes: payment amount, payer, payee, timestamp, network
- Validation Registry:
0x3fF1AD739e85794Be9Bd1DBda4E9fE6cDae5EDdF
MCP Integration (7 New Tools)
| Tool | Description |
|---|---|
check_identity | Check if user has ERC-8004 identity |
get_my_identity | Get full identity details |
mint_identity | Mint new identity NFT |
get_agent_reputation | Query any agent's reputation |
get_reputation_leaderboard | Top agents by score |
submit_feedback | Submit reputation feedback |
get_identity_stats | Overall statistics |
Why This Matters
The rise of autonomous AI agents creates a trust problem: How can agents and users trust unknown counterparties without centralized gatekeepers?
ERC-8004 solves this with an open, verifiable trust layer where:
- Reputation follows agents across platforms
- Fake reviews are economically prohibitive (requires real payments)
- Quality service builds lasting, portable credibility
- Bad actors carry visible on-chain records
Combined with Dexter's x402 facilitator, this creates a system where value and reputation flow together.
How It Works
- Create your identity – mint via MCP tool or API
- Transact via x402 – every payment can generate reputation data
- Build reputation – quality service earns verified reviews
- Query before transacting – check counterparty reputation via API or MCP tools
Technical Capabilities
| Feature | Base | Solana |
|---|---|---|
| Identity Standard | ERC-721 | SATI |
| Feedback Storage | On-chain | Compressed NFT |
| Signature Algorithm | secp256k1 | Ed25519 |
Integration
REST API:
GET /api/identity/me – Get your identities
POST /api/identity/mint – Mint new identity
GET /api/reputation/:id – Get agent reputation
POST /api/reputation/feedback – Submit feedback
MCP Tools:
All 7 tools available via mcp.dexter.cash
About Dexter
Dexter is building the payment infrastructure for autonomous AI on Solana and Base. The ERC-8004 Trust Layer extends Dexter's capabilities with verifiable identity and reputation, creating a complete infrastructure for trustworthy agent interactions.
- Dexter Facilitator: x402 payment settlement
- Dexter MCP: 70+ AI tools via Model Context Protocol
- Dexter Marketplace: Discover and monetize AI services
- Dexter Trust Layer: ERC-8004 identity and reputation
Resources
- ERC-8004 Spec: eips.ethereum.org/EIPS/eip-8004
- x402 Protocol: x402.org
- SATI SDK: github.com/cascade-fyi/sati-sdk
- Twitter: @dexteraisol
- Telegram: t.me/dexterdao