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NPS Python SDK (nps-lib)

Python client library for the Neural Protocol Suite (NPS) — a complete internet protocol stack designed for AI agents and models.

PyPI package: nps-lib | Python namespace: nps_sdk

Status

v1.0.0-alpha.16 — RFC-0002 cross-SDK port (second language)

Covers all five protocols — NCP + NWP + NIP + NDP + NOP — frame definitions, async client, Ed25519 identity management, plus full NPS-RFC-0002 X.509 + ACME agent-01 NID certificate primitives (nps_sdk.nip.x509 + nps_sdk.nip.acme).

Tests: 221 across the SDK + RFC-0002/0003/0004 coverage, all passing.

Alpha.15 additions: typed remote NIP CA client (nps_sdk.nip.NipCaClient), native-mode NWP serving helper (nps_sdk.nwp.NwpNativeNodeServer), and TC-N1/TC-N2 conformance manifest helpers (nps_sdk.conformance).

Requirements

• Python 3.11+
• Dependencies: msgpack, httpx, cryptography

Unreleased on main

The main branch additionally carries the alpha.16-cycle server-surface parity wave (not yet in any published package; ships with the next suite release):

• NOP orchestration engine — DAG validator, condition evaluator, input mapper, result aggregator, task store, worker client, callback validator, instrumentation
• NCP native-mode transport — server, session, client, frame IO, handshake caps, encoding policy, patch format
• NIP CA service — CA router + RA admission model, SQL-backed CA store, TrustFrame validator, full six-step §7 VerifyFull verifier
• NWP server surface extensions (memory/complex node serving)
• Daemon observability (health / metrics / logging / shutdown) and telemetry

Installation

pip install nps-lib

For development:

pip install "nps-lib[dev]"

Modules

Quick Start

Encoding / Decoding NCP Frames

from nps_sdk.core.codec import NpsFrameCodec
from nps_sdk.core.registry import FrameRegistry
from nps_sdk.ncp.frames import AnchorFrame, FrameSchema, SchemaField

registry = FrameRegistry.create_default()
codec    = NpsFrameCodec(registry)

schema = FrameSchema(fields=(
    SchemaField(name="id",    type="uint64"),
    SchemaField(name="price", type="decimal", semantic="commerce.price.usd"),
))
frame  = AnchorFrame(anchor_id="sha256:...", schema=schema)

wire   = codec.encode(frame)           # bytes — Tier-2 MsgPack by default
result = codec.decode(wire)            # → AnchorFrame

Anchor Cache (Schema Deduplication)

from nps_sdk.core.cache import AnchorFrameCache

cache     = AnchorFrameCache()
anchor_id = cache.set(frame)           # stores; returns canonical sha256 anchor_id
frame     = cache.get_required(anchor_id)

Querying a Memory Node (async)

import asyncio
from nps_sdk.nwp import NwpClient, QueryFrame

async def main():
    async with NwpClient("https://node.example.com") as client:
        caps = await client.query(
            QueryFrame(anchor_ref="sha256:...", limit=50)
        )
        print(caps.count, caps.data)

asyncio.run(main())

Invoking an Action Node (async)

from nps_sdk.nwp import NwpClient, ActionFrame

async with NwpClient("https://node.example.com") as client:
    result = await client.invoke(
        ActionFrame(action_id="orders.create", params={"sku": "X-101", "qty": 1})
    )

Native NWP Serving

from nps_sdk.nwp import NwpNativeNodeServer

server = NwpNativeNodeServer(
    query_handler=lambda query: [{"id": 42}],
    action_handler=lambda action: {"action": action.action_id},
)

# `reader`/`writer` are already past NCP preamble, TLS, and Hello negotiation.
await server.serve(reader, writer)

NIP Identity Management

from nps_sdk.nip.identity import NipIdentity

# Generate and save an encrypted Ed25519 keypair
identity = NipIdentity.generate("ca.key", passphrase="my-secret")

# Load from file
identity = NipIdentity()
identity.load("ca.key", passphrase="my-secret")

# Sign a NIP frame payload (canonical JSON, no 'signature' field)
sig = identity.sign(ident_frame.unsigned_dict())

# Verify
ok = NipIdentity.verify_signature(identity.pub_key_string, payload, sig)

NIP Remote CA Client

from nps_sdk.nip import NipCaClient, NipCaRegisterRequest

async with NipCaClient("https://ca.example.com", route_prefix="/nip") as ca:
    discovery = await ca.get_discovery()
    ident = await ca.register_agent(
        NipCaRegisterRequest("agent-a", "ed25519:<pub>", ("nwp:query",)),
        bearer_token="token",
    )
    status = await ca.verify_agent(ident.nid)

Conformance Manifest

from nps_sdk.conformance import (
    NODE_L1,
    NpsConformanceCaseResult,
    NpsConformanceManifest,
    catalog_for_profile,
    validate_manifest,
)

results = [NpsConformanceCaseResult(case.id, "pass") for case in catalog_for_profile(NODE_L1)]
manifest = NpsConformanceManifest.create(
    profile=NODE_L1,
    iut_name="my-node",
    iut_version="1.0.0-alpha.16",
    iut_nid="urn:nps:node:example.com:my-node",
    peer_name="labacacia-fixture",
    peer_version="1.0.0-alpha.16",
    results=results,
)
result = validate_manifest(manifest)

Architecture

nps_sdk/
├── core/          # Wire primitives (FrameHeader, codec, cache, exceptions)
├── ncp/           # NCP frames (0x01–0x0F)
├── nwp/           # NWP frames (0x10–0x1F) + async HTTP client
└── nip/           # NIP frames (0x20–0x2F) + Ed25519 identity

Frame Encoding Tiers

NWP HTTP Overlay Mode

NwpClient communicates via HTTP with Content-Type: application/x-nps-frame. Sub-paths per operation:

Running Tests

pytest                 # all tests + coverage report
pytest -k test_nip     # NIP tests only

Coverage target: ≥ 90 %.

License

Apache 2.0 — see LICENSE.

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