attestix

TypeScript SDK and offline verifier for Attestix - Attestation Infrastructure for AI Agents.

This is the JavaScript/TypeScript engine in the Attestix family. Version 0.4.0 is aligned with the Attestix 0.4.0 release line: the same name, the same version, and the same conformance suite across every ecosystem (Python on PyPI, this package on npm, and the Go / Rust / Java / R verifier ports). A credential or delegation issued by Attestix 0.4.0 (in any engine) verifies here, byte-for-byte, offline.

Provides typed client methods for identity management, verifiable credentials, compliance tracking, reputation scoring, provenance recording, delegation chains, DID operations, and blockchain anchoring.

Installation

npm install attestix

Heads-up on the package name (transition state). The unscoped attestix name on npm is claimed but not yet published — the unscoped publish is pending a registry token. Until that lands, the published artifact is the scoped, stale @vibetensor/attestix@0.2.0:
npm install @vibetensor/attestix   # currently published (0.2.0)
Once attestix@0.4.0 is published, @vibetensor/attestix will be deprecated with a pointer to the unscoped name. Prefer attestix in new code.

Quick Start

import { AttestixClient } from 'attestix';

const client = new AttestixClient({
  baseUrl: 'https://api.attestix.io',
  apiKey: 'your-api-key',
});

// Create an agent identity
const identity = await client.createIdentity({
  name: 'My AI Agent',
  type: 'autonomous',
  capabilities: ['text-generation', 'code-review'],
});

console.log(identity.agent_id);

// Issue a credential
const credential = await client.issueCredential({
  issuer: identity.agent_id,
  subject: identity.agent_id,
  type: 'SafetyAudit',
  claims: { passed: true, score: 95 },
});

// Verify it
const result = await client.verifyCredential(credential.credential_id);
console.log(result.valid); // true

Offline verification (cross-engine interop)

Since v0.2.0 the package can verify Attestix Ed25519-signed W3C Verifiable Credentials / Presentations and UCAN-style delegation chains entirely offline — no API call, in Node or the browser. The canonical-JSON rules, did:key codec, and signed-field sets are byte-compatible with the Python Attestix engine, so a credential or delegation issued by the Python server verifies in JS/TS and vice-versa. This is the cross-engine interop path tracked in attestix#7; the exact wire format and canonicalization rules are documented in SPEC.md.

It adds one small, audited dependency (@noble/curves) for Ed25519 and no network access.

Cross-language conformance

The verifier is held to the shared conformance vectors maintained in the foundation repo at spec/verify/v1 (canonical-form rules in README.md, verifier surface in CONFORMANCE.md). These are the same vectors every port (Go, Rust, Java, R, JS) must reproduce byte-for-byte. This package runs them in CI (tests/conformance.test.ts) against the vectors.json for attestix 0.4.0, so the npm engine stays on the exact same suite as the others.

Verify a credential

import { verifyCredential } from 'attestix';

// `vc` is the raw VC JSON (e.g. from issueCredential, a file, or a QR payload)
const result = verifyCredential(vc);

if (result.valid) {
  console.log('Issuer:', result.issuer);   // did:key:z...
  console.log('Subject:', result.subject);
} else {
  console.log('Invalid:', result.reason);   // e.g. "Invalid signature"
}

// Per-check detail:
// result.checks = { structure_valid, signature_valid, not_expired, not_revoked }

verifyCredential recomputes the canonical bytes over the signed fields (everything except the mutable proof and credentialStatus), then verifies the Ed25519Signature2020 proof against the issuer's did:key. Revocation can only be confirmed against the embedded credentialStatus; live revocation is a server-side lookup, so not_revoked reflects only what is present in the document offline.

Verify a delegation chain

import { verifyDelegationChain } from 'attestix';

// Pass the leaf JWT (its `prf` parent chain is walked automatically),
// or an explicit array of tokens ordered leaf..root.
const result = verifyDelegationChain(leafToken);

if (result.valid) {
  console.log('Effective capabilities:', result.capabilities);
  console.log('Chain length:', result.links.length);
}

verifyDelegationChain verifies every link's EdDSA JWS signature against its issuer did:key, walks the full prf proof chain, detects cycles, enforces expiry/nbf, and re-checks capability attenuation (each child's att must be a subset of its parent's att) so a forged chain that escalates scope is rejected.

Lower-level primitives

The canonicalizer, did:key codec, and raw Ed25519 verify are also exported:

import {
  canonicalize,        // JSON value -> canonical UTF-8 bytes (Python-compatible)
  didKeyToPublicKey,   // did:key:z... -> 32-byte Ed25519 public key
  publicKeyToDidKey,   // 32-byte Ed25519 public key -> did:key:z...
  verifyEd25519,       // (signature, message, publicKey) -> boolean
  verifyPresentation,  // verify a Verifiable Presentation + its embedded VCs
} from 'attestix';

API Reference

Identity

Method	Description
`createIdentity(params)`	Register a new agent identity
`getIdentity(agentId)`	Retrieve an identity by agent ID
`listIdentities(params?)`	List identities with optional filters
`verifyIdentity(agentId)`	Verify an identity's validity
`translateIdentity(agentId, format)`	Translate identity to another format
`revokeIdentity(agentId, reason?)`	Revoke an identity
`purgeAgentData(agentId)`	Delete all data for an agent

Credentials

Method	Description
`issueCredential(params)`	Issue a new verifiable credential
`getCredential(credentialId)`	Retrieve a credential
`listCredentials(params?)`	List credentials with filters
`verifyCredential(credentialId)`	Verify a credential
`verifyExternalCredential(credential)`	Verify an externally-issued credential
`revokeCredential(credentialId, reason?)`	Revoke a credential
`createPresentation(params)`	Create a verifiable presentation

Compliance

Method	Description
`createComplianceProfile(params)`	Create a compliance profile
`getComplianceProfile(profileId)`	Get a compliance profile
`listComplianceProfiles()`	List all compliance profiles
`getComplianceStatus(profileId)`	Get compliance status
`recordAssessment(params)`	Record a compliance assessment
`generateDeclaration(params)`	Generate a declaration of conformity

Reputation

Method	Description
`recordInteraction(params)`	Record an agent interaction
`getReputation(agentId)`	Get reputation score for an agent
`queryReputation(params?)`	Query reputation scores with filters

Provenance

Method	Description
`recordTrainingData(params)`	Record training data provenance
`recordModelLineage(params)`	Record model lineage
`logAction(params)`	Log an auditable action
`getProvenance(agentId)`	Get provenance entries for an agent
`getAuditTrail(params?)`	Query the audit trail

Delegation

Method	Description
`createDelegation(params)`	Create a delegation chain
`listDelegations(params?)`	List delegations
`verifyDelegation(token)`	Verify a delegation token
`revokeDelegation(delegationId)`	Revoke a delegation

DID

Method	Description
`createDidKey()`	Create a did:key document
`createDidWeb(domain)`	Create a did:web document
`resolveDid(did)`	Resolve a DID to its document

Blockchain Anchoring

Method	Description
`anchorIdentity(agentId)`	Anchor an identity on-chain
`anchorCredential(credentialId)`	Anchor a credential on-chain
`anchorAuditBatch(entryIds?)`	Anchor a batch of audit entries
`verifyAnchor(anchorId)`	Verify an on-chain anchor
`getAnchorStatus(anchorId)`	Get anchor status
`estimateAnchorCost()`	Estimate anchoring cost

Offline Verification

Function	Description
`verifyCredential(vc, options?)`	Verify a W3C VC's Ed25519 proof, structure, and expiry offline
`verifyPresentation(vp, options?)`	Verify a VP's holder proof and every embedded credential offline
`verifyDelegationChain(token \| tokens, options?)`	Verify a UCAN/JWT delegation chain (signatures, attenuation, expiry, cycles)
`canonicalize(value)`	Canonical UTF-8 bytes matching the Python engine's JCS form
`didKeyToPublicKey(did)` / `publicKeyToDidKey(bytes)`	did:key (Ed25519) decode / encode
`verifyEd25519(sig, msg, pubKey)`	Raw Ed25519 signature verification

Error Handling

The SDK throws typed errors based on HTTP status codes:

import {
  AttestixAuthError,
  AttestixNotFoundError,
  AttestixValidationError,
  AttestixRateLimitError,
} from 'attestix';

try {
  await client.getIdentity('nonexistent');
} catch (error) {
  if (error instanceof AttestixNotFoundError) {
    console.log('Agent not found');
  } else if (error instanceof AttestixAuthError) {
    console.log('Invalid API key');
  } else if (error instanceof AttestixRateLimitError) {
    console.log(`Rate limited, retry after ${error.retryAfter}s`);
  }
}

Configuration

const client = new AttestixClient({
  baseUrl: 'https://api.attestix.io',  // Required: API server URL
  apiKey: 'your-api-key',               // Required: API key
  timeout: 30000,                        // Optional: request timeout in ms (default: 30000)
});

The SDK automatically retries on 429 (rate limit) and 503 (service unavailable) responses with exponential backoff.

License

Apache-2.0

Links

Attestix (parent repo) — the Attestix core engine (Python, PyPI)
Verifier conformance spec — shared cross-language vectors + canonical-form rules
Attestix Documentation
GitHub (this package)
VibeTensor

Name		Name	Last commit message	Last commit date
Latest commit History 4 Commits
.github		.github
src		src
tests		tests
.gitignore		.gitignore
CHANGELOG.md		CHANGELOG.md
CONTRIBUTING.md		CONTRIBUTING.md
LICENSE		LICENSE
README.md		README.md
SECURITY.md		SECURITY.md
SPEC.md		SPEC.md
package-lock.json		package-lock.json
package.json		package.json
tsconfig.json		tsconfig.json
tsup.config.ts		tsup.config.ts

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attestix

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Quick Start

Offline verification (cross-engine interop)

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Verify a credential

Verify a delegation chain

Lower-level primitives

API Reference

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attestix

Installation

Quick Start

Offline verification (cross-engine interop)

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Verify a credential

Verify a delegation chain

Lower-level primitives

API Reference

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Credentials

Compliance

Reputation

Provenance

Delegation

DID

Blockchain Anchoring

Offline Verification

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