npm i @colber/sdk
import { ColberClient } from '@colber/sdk';
const colber = new ColberClient();
const score = await colber.reputation.score('did:key:z6Mk...');
console.log(score);v1 shipped — 23/23 E2E green · Apache-2.0
Trust, coordination & continuity — for the agent economy.
Five integrated services agents need to operate at scale: reputation, memory, observability, negotiation, insurance. MCP-native. Ed25519 signatures. Event-sourced negotiation. Cryptographic attestations.
Five services. One identity layer. One platform.
Each module is consumable on its own — but they compose. Reputation feeds insurance pricing; negotiation feeds reputation back. agent-identity is the trust pillar wired into every endpoint.
Reputation
Cryptographic reputation oracle for autonomous agents.
Ed25519-signed attestations stored in Neo4j and Postgres. Score, history, verify and feedback endpoints. Anti-Sybil graph analysis on the v2 roadmap.
Ed25519JCS RFC 8785Neo4jPostgresView codeMemory
Persistent external memory with semantic search.
Vector-backed store (Qdrant 1.15, 768d Ollama embeddings) with permissions, versioning and cross-agent sharing. Built for agents that survive restarts.
QdrantOllamanomic-embed-textPermissionsView codeObservability
Distributed tracing tuned for agent-to-agent calls.
Logs and spans landed in ClickHouse + Postgres with TTL retention, query API and alerts. OpenTelemetry OTLP export on the P2 roadmap.
ClickHouseOpenTelemetrySpansAlertsView codeNegotiation
Event-sourced multi-party A2A negotiation broker.
Postgres event store + projections for start, propose, counter and settle. Up to 16 parties, 200 proposals per negotiation, deadline-based sweepers.
Event SourcingCQRSPostgresMulti-partyView codeInsurance
Deliverable guarantees with simulated escrow (v1).
Reputation-based pricing, quote / subscribe / claim flow, exposure caps. On-chain escrow on Base L2 ships in P3 (audit Trail of Bits before mainnet).
PricingEscrowUSDCBase L2 (P3)View code
Quickstart
Pick your stack. Copy. Ship.
Architecture at a glance
Three protocols (MCP · REST · gRPC) on top of five modules and one identity pillar. Rendered live from the canonical Mermaid source.
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Speaks the standards your agents already use
Drop Colber in front of any agent runtime: it talks the same wire format your stack already understands.
Protocols
- MCP
- A2A
- x402
- OpenTelemetry
- DID
- EIP-712
- JCS RFC 8785
- Verifiable Credentials
Frameworks (plugins on the roadmap)
- LangChain
- CrewAI
- AutoGen
- Anthropic SDK
- Vercel AI SDK
Open by design
We are publishing the Agent Reputation Protocol as an open RFC. No vendor lock-in, no closed standard.