licensefoundry 0.2.0

Python SDK for licensefoundry — issuance, verification, and CoMP-shaped translation of W3C Verifiable Credentials.

licensefoundry

Python SDK for licensefoundry — issuance, verification, and CoMP-shaped translation of W3C Verifiable Credentials (JWT-VC encoded, Ed25519-signed).

Built in: Phase 5 of /docs/path-c-rebuild-plan.md.

Install

pip install licensefoundry

Requires Python ≥ 3.10.

Quick start

import os
from licensefoundry import (
    LicenseFoundryClient,
    IssueCredentialRequest,
    Rights,
    TrainGrant,
    TrainScope,
    CommercialGrant,
    CredentialScope,
    Attribution,
    CapabilityNotEnabledError,
)

with LicenseFoundryClient(
    base_url="https://api.licensefoundry.com",
    api_key=os.environ["LICENSEFOUNDRY_API_KEY"],
    # Production verifiers MUST list only their production issuer DID
    accepted_issuers=["did:web:licensefoundry.com"],
) as lf:
    try:
        cred = lf.issuer.issue_credential(IssueCredentialRequest(
            asset_id="...",
            rights=Rights(
                train=TrainGrant(granted=True, scope=TrainScope(model_family="open-source")),
                commercial=CommercialGrant(granted=True),
            ),
            scope=CredentialScope(
                audience="single_product",
                product_id="my-rag",
                jurisdiction=["US"],
                attribution=Attribution(required=True),
            ),
        ))
        print(cred.credential_jwt)
    except CapabilityNotEnabledError as e:
        show_upgrade_modal(plan=e.required_plan, url=e.upgrade_url)

    # Verify offline (uses cached JWKS + Status List 2021)
    result = lf.verifier.verify(some_jwt)
    if not result.valid:
        print("invalid:", result.errors)

Public surface

Module	Use for
lf.issuer	register_asset, issue_credential, revoke_credential, status
lf.verifier	Offline verification with cached JWKS and Status List 2021
licensefoundry.comp	from_credential(vc), satisfies(vc, function=, ause=, ...)

The customer-facing API uses canonical Path C field names (train, rag, embed, display, eval, derive, commercial). CoMP terminology (function, subfn, ause, licensedur, etc.) is opt-in via licensefoundry.comp.

Typed errors

Per /docs/auth-access-flows.md §4.5, HTTP failures surface as typed exceptions:

Exception	When
AuthError	401 — bad/missing API key
CapabilityNotEnabledError	402 with error: capability_not_enabled — upgrade needed
ScopeDeniedError	403 — API key scope rejects this action
NotFoundError	404
ConflictError	409 — e.g. asset not yet anchored
ValidationError	422
RateLimitedError	429 — carries retry_after
ServerError	5xx
NetworkError	request failure / timeout
VerificationError	raised by verifier.verify_or_raise()

Verification

Verifier performs offline verification per /docs/credential-format.md §7:

1. Parse JWT
2. Resolve issuer (cached did:web → JWKS)
3. EdDSA signature verification (via cryptography)
4. Temporal validity
5. @context and issuer accepted-list checks
6. Revocation via Status List 2021 bitstring (cached)

Per /docs/billing-model.md §2, offline verification is free — no metering event. Online verification (calling the issuer's /v1/credentials/verify endpoint) is metered.

Specs that govern this SDK

• /docs/credential-format.md — wire format and verification
• /docs/comp-mapping.md — CoMP translation
• /docs/auth-access-flows.md §4.5 — typed error contracts
• /docs/billing-model.md §2 — what is metered

Develop

pip install -e ".[dev]"
pytest
ruff check .
mypy src