paegents 2.6.0

Official Python SDK for Paegents - Payment infrastructure for AI agents with Service Catalog and Usage Escrow

Paegents Python SDK

The official Python SDK for Paegents - Payment infrastructure for AI agents.

Installation

pip install paegents

Quick Start

from paegents import PaegentsSDK

# Initialize the SDK
sdk = PaegentsSDK(
    api_url="https://api.paegents.com",
    agent_id="my_ai_agent",
    api_key="ak_live_your_api_key_here"
)

# Make an A2A payment to a supplier
response = sdk.pay_supplier(
    supplier="acme-corp.com",
    amount=2500,  # $25.00 in cents
    description="GPU compute credits"
)

print(f"Payment {response.status}: {response.txn_id}")

# Check payment status
status = sdk.check_a2a_status(response.txn_id)
print(f"Current status: {status.status}")

AP2 Mandates & Stablecoin (x402)

Use AP2 to pre-authorize spend via intent/cart mandates and execute payments across card, ACH, and stablecoin rails.

import os
from paegents import (
    build_card_payment_method,
    build_stablecoin_payment_method,
)

# 1) Create an intent mandate for your agent
intent = sdk.create_ap2_intent_mandate(
    policy={
        "max_amount": {"value": 25_00},  # $25 ceiling
        "currency": "usd"
    }
)

# 2) Attach a cart mandate (invoice/basket)
cart = sdk.create_ap2_cart_mandate(
    intent_mandate_id=intent.id,
    cart={
        "total": 12_50,
        "currency": "usd",
        "description": "Monthly agent hosting"
    }
)

# 3a) Execute a card payment (Stripe/Braintree)
card_payment = sdk.ap2_pay(
    intent_mandate_id=intent.id,
    cart_mandate_id=cart.id,
    payment_method=build_card_payment_method(provider="stripe")
)
print(card_payment.status)

# 3b) Execute a stablecoin payment on Coinbase x402 (secure client-side signing)
stablecoin_payment = sdk.ap2_pay(
    intent_mandate_id=intent.id,
    cart_mandate_id=cart.id,
    payment_method=build_stablecoin_payment_method(
        payer_private_key=os.environ["STABLE_COIN_PRIVATE_KEY"],
        destination_wallet="0xSellerWallet...",
        amount_cents=1250,  # $12.50
        resource_id=f"cart:{cart.id}",
        description="Monthly agent hosting",
        network="base-sepolia",  # or "base" for mainnet
    )
)
print(stablecoin_payment.onchain_txid)

Security Note: build_stablecoin_payment_method signs the payment CLIENT-SIDE. Your private key never leaves your environment - only the signed authorization is sent to the server.

The stablecoin helper accepts optional parameters (network, max_timeout_seconds, description) to customize the payment authorization.

A2A (Agent-to-Agent) Payments

The core feature of Paegents is seamless agent-to-agent payments using domain-based supplier resolution.

Making a Payment

# Pay a supplier by domain
response = sdk.pay_supplier(
    supplier="software-company.io",
    amount=5000,  # $50.00 in cents
    description="API usage charges",
    currency="usd"  # Optional, defaults to USD
)

# Handle different response statuses
if response.status == "paid":
    print(f"Payment successful! Transaction: {response.txn_id}")
elif response.status == "processing":
    print(f"Payment processing... Transaction: {response.txn_id}")
elif response.status == "supplier_onboarding":
    print(f"Supplier needs onboarding: {response.next_action_url}")
elif response.status == "failed":
    print(f"Payment failed: {response.error}")

Checking Payment Status

# Poll for status updates
status = sdk.check_a2a_status("agt_txn_123abc456def")

print(f"Status: {status.status}")
print(f"Events: {status.events}")

Traditional MCP Payments

For payments to specific accounts (legacy method):

Stripe Payments

from paegents import PaymentRequest

# Pay a Stripe account
payment = PaymentRequest(
    agent_id="my_agent",
    amount=1000,  # $10.00
    currency="usd",
    description="Service payment",
    payment_method="stripe",
    recipient_account_id="acct_stripe_account_id"
)

response = sdk.create_payment(payment)
print(f"Payment intent: {response.payment_intent_id}")

PayPal Payments

from paegents import PayPalPaymentRequest

# Pay via PayPal email
paypal_payment = PayPalPaymentRequest(
    agent_id="my_agent",
    recipient_email="[e-mail]",
    amount=25.00,  # PayPal uses dollars
    description="Consulting services"
)

response = sdk.create_paypal_payment(paypal_payment)
print(f"PayPal payment: {response.payment_intent_id}")

Account Management

Check Spending Limits

limits = sdk.check_balance()
print(f"Daily remaining: ${limits.daily_remaining / 100:.2f}")
print(f"Monthly remaining: ${limits.monthly_remaining / 100:.2f}")

Discover Recipients

# Search for payment recipients
results = sdk.search_recipients("acme", payment_method="all")
for result in results.results:
    print(f"Found: {result['business_name']} ({result['payment_method']})")

# Check if email can receive PayPal
discovery = sdk.discover_paypal_email("[e-mail]")
if discovery.can_receive_paypal:
    print(f"✅ {discovery.email} can receive PayPal payments")

Verify Receipts

# Verify payment receipt authenticity
verification = sdk.verify_receipt("receipt_id_here")
if verification['valid']:
    print("✅ Receipt is authentic")
    print(f"Amount: ${verification['receipt']['amount'] / 100:.2f}")
else:
    print("❌ Receipt verification failed")

Error Handling

try:
    response = sdk.pay_supplier("unknown-company.com", 1000, "Test payment")
except Exception as e:
    print(f"Payment failed: {e}")

Policies and Approvals (Owner JWT)

Some endpoints require the human owner (JWT). Pass a JWT per call.

# Get and update policies
pol = sdk.get_agent_policies(agent_id="my-agent", jwt_token=os.environ["OWNER_JWT"])  # returns { agent_id, policy }
sdk.update_agent_policies({
    "rails": {"allowed": ["card", "stablecoin"]},
    "approvals": {"threshold_cents": 2000},
    "recipients": {"whitelist": ["0x1111..."]},
}, agent_id="my-agent", jwt_token=os.environ["OWNER_JWT"])  # returns { updated, policy }

# Approvals queue (after AP2 approval_required)
pending = sdk.list_approvals(status="pending", limit=20, agent_id="my-agent", jwt_token=os.environ["OWNER_JWT"])  # { approvals, count }
if pending.get("approvals"):
    sdk.approve_approval(pending["approvals"][0]["id"], agent_id="my-agent", jwt_token=os.environ["OWNER_JWT"])  # { approved: true }

AP2 Approval Handling

When approval is required, ap2_pay returns a dict with approval_required rather than raising:

res = sdk.ap2_pay(
    intent_mandate_id=intent.id,
    cart_mandate_id=cart.id,
    payment_method=build_card_payment_method(provider="stripe")
)

if isinstance(res, dict) and res.get("approval_required"):
    print("Approval requested:", res["request_id"])  # approve via SDK or dashboard

Shipping Address & Delivery Tracking (February 2026)

Support for physical goods with shipping addresses and delivery tracking.

Create Agreement with Shipping Address (Buyer)

from paegents import ShippingAddress, UsageAgreementRequest

# Include shipping address for physical goods
agreement = sdk.create_usage_agreement(
    UsageAgreementRequest(
        seller_agent_id='seller-123',
        quantity=1,
        unit='item',
        price_per_unit_cents=2999,
        payment_method=build_card_payment_method(provider='stripe').to_dict(),
        cart_items=[
            {
                'sku': 'USB-DRIVE-64GB',
                'description': '64GB USB Drive',
                'quantity': 1,
                'amount_cents': 2999,
                'attributes': {'requires_shipping': True}
            }
        ],
        shipping_address=ShippingAddress(
            recipient_name='John Doe',
            street1='123 Main Street',
            street2='Apt 4B',
            city='San Francisco',
            state='CA',
            postal_code='94102',
            country='US',
            phone='[phone]'
        )
    )
)

# Check if cart items require shipping
if sdk.requires_shipping(agreement.cart_items):
    print('This order requires a shipping address')

Update Delivery Status (Seller)

from paegents import UpdateDeliveryRequest, DeliveryStatus, CarrierType

# Mark as shipped with tracking info
result = sdk.update_delivery(
    agreement.agreement_id,
    UpdateDeliveryRequest(
        status=DeliveryStatus.SHIPPED.value,
        carrier=CarrierType.UPS.value,
        tracking_number='1Z999AA10123456784',
        estimated_delivery='2026-02-07T18:00:00Z',
        notes='Signature required'
    )
)

# Tracking URL auto-generated for known carriers
print(f"Track at: {result.delivery['tracking_url']}")
# → https://www.ups.com/track?tracknum=1Z999AA10123456784

# Update to in_transit
sdk.update_delivery(
    agreement.agreement_id,
    UpdateDeliveryRequest(status='in_transit')
)

# Mark as delivered
sdk.update_delivery(
    agreement.agreement_id,
    UpdateDeliveryRequest(status='delivered', notes='Left at front door')
)

Get Delivery Info from Agreement

# Fetch agreement and extract delivery/shipping info
agreement = sdk.get_usage_agreement('agree_123')

shipping = sdk.get_shipping_address(agreement)
if shipping:
    print(f"Ship to: {shipping.recipient_name}")
    print(f"Address: {shipping.street1}, {shipping.city}, {shipping.state}")

delivery = sdk.get_delivery_info(agreement)
if delivery:
    print(f"Status: {delivery.status}")
    print(f"Tracking: {delivery.tracking_url}")
    print(f"History: {len(delivery.history or [])} updates")

Delivery Status State Machine

Valid transitions:

• pending → shipped
• shipped → in_transit, exception
• in_transit → out_for_delivery, delivered, exception
• out_for_delivery → delivered, exception
• exception → in_transit, out_for_delivery, delivered
• delivered → (terminal state)

Usage Agreements: Cart Itemization and Suggestions

Add cart line items on proposal; sellers can reject with suggestions:

agreement = sdk.create_usage_agreement(UsageAgreementRequest(
    seller_agent_id='seller-123',
    quantity=1000,
    unit='api_calls',
    price_per_unit_cents=10,
    payment_method=build_card_payment_method(provider='stripe').to_dict(),
    cart_items=[{"description": "Requests bundle", "quantity": 1, "amount_cents": 10_000}],
    client_proposal_id='agree_demo_001',
))

# Seller reject with suggestions
sdk.reject_usage_agreement_with_suggestions(
    agreement.agreement_id,
    reason="Offer 2k calls at a discount",
    suggested_total_cents=18_000,
)

Owner Spending Limits (JWT)

Get and update the human account’s daily/monthly limits:

limits = sdk.get_spending_limits_owner(os.environ["OWNER_JWT"])  # { daily_limit, monthly_limit, current_daily_spent, current_monthly_spent }
sdk.update_spending_limits_owner(50, 200, os.environ["OWNER_JWT"])  # daily $50, monthly $200

Webhooks Operations

Manage webhooks and deliveries programmatically:

sdk.create_webhook("https://example.com/hooks", event_types=["agreement.*"], agent_id="my-agent", jwt_token=os.environ["OWNER_JWT"]))
subs = sdk.list_webhooks(agent_id="my-agent", jwt_token=os.environ["OWNER_JWT"])  # { webhooks: [...] }
sdk.rotate_webhook_secret(subs["webhooks"][0]["id"], agent_id="my-agent", jwt_token=os.environ["OWNER_JWT"]))

deliveries = sdk.list_webhook_deliveries(status="failed", limit=10, agent_id="my-agent", jwt_token=os.environ["OWNER_JWT"])  # { deliveries, count }
if deliveries.get("deliveries"):
    sdk.replay_webhook_delivery(deliveries["deliveries"][0]["id"], agent_id="my-agent", jwt_token=os.environ["OWNER_JWT"])  # { replayed: true }

Typed Errors

The SDK raises PolicyDeniedError for policy blocks and ApiError for other HTTP errors:

from paegents import PolicyDeniedError

try:
    sdk.ap2_pay(intent_mandate_id='i', cart_mandate_id='c', payment_method=build_card_payment_method())
except PolicyDeniedError as e:
    print("Policy blocked payment:", e)

Marketplace: Usage Agreements

Create prepaid usage agreements between buyer and seller agents via the SDK. The dashboard is monitoring-first; creation and acceptance are SDK-only. Provide client_proposal_id for idempotency across retries.

from paegents import PaegentsSDK
from paegents import build_card_payment_method

sdk = PaegentsSDK(api_url, agent_id, api_key)

# Buyer proposes an agreement
agreement = sdk.create_usage_agreement(
    request=UsageAgreementRequest(
        seller_agent_id='seller-agent-123',
        quantity=1000,
        unit='api_calls',
        price_per_unit_cents=10,
        payment_method=build_card_payment_method(provider='stripe').to_dict(),
        client_proposal_id='agree_demo_001',  # optional but recommended
        expires_in_hours=24,
    )
)

# Seller lists incoming proposals
incoming = sdk.list_usage_agreements(role='seller', status='proposed', limit=50)

# Seller accepts (idempotent)
accepted = sdk.accept_usage_agreement(agreement.agreement_id)

# Or reject
sdk.reject_usage_agreement(agreement.agreement_id)

# Fetch agreement details
details = sdk.get_usage_agreement(agreement.agreement_id)

Notes

• The SDK sets Idempotency-Key headers for propose/accept/reject automatically; include a stable client_proposal_id to dedupe across process restarts.
• Listing uses your SDK agent_id with an optional role filter (buyer or seller).

Pollable Inbox

Agents can poll for events (e.g., agreement.proposed, agreement.accepted) without configuring webhooks. Useful for local dev, serverless, or NAT’d environments.

# List recent events for this agent
events = sdk.list_agent_events(types=["agreement.proposed", "agreement.accepted"], limit=50)

for evt in events:
    if evt.type == "agreement.proposed":
        # Inspect evt.payload["agreement_id"], etc.
        pass
    sdk.ack_agent_event(evt.event_id)

Notes

• Use the after cursor with the last seen event_id to paginate.
• Acknowledgement is idempotent and safe to retry.

Webhook Verification

Verify webhook signatures (HMAC-SHA256) sent by Paegents.

from paegents import verify_webhook_signature

signature = request.headers.get('Paegents-Signature')
raw_body = request.data.decode('utf-8')  # or request.get_data(as_text=True)
secret = os.environ['PAEGENTS_WEBHOOK_SECRET']

try:
    verify_webhook_signature(signature_header=signature, raw_body=raw_body, secret=secret)
    event = json.loads(raw_body)
    # handle event
except Exception as e:
    return ("Invalid signature", 400)

Header format: Paegents-Signature: t=<unix>, v1=<hex(hmac_sha256(secret, f"{t}.{body}"))>.

Configuration

Environment Variables

You can set default configuration via environment variables:

export PAEGENTS_API_URL="https://api.paegents.com"
export PAEGENTS_API_KEY="ak_live_your_key_here" 
export PAEGENTS_AGENT_ID="my_agent_id"

import os
from paegents import PaegentsSDK

# SDK will use environment variables if not provided
sdk = PaegentsSDK(
    api_url=os.getenv("PAEGENTS_API_URL"),
    agent_id=os.getenv("PAEGENTS_AGENT_ID"),
    api_key=os.getenv("PAEGENTS_API_KEY")
)

Service Catalog (Gap 2)

Discover and register services in the Paegents marketplace.

Register a Service

New in January 2026: Services can now include API credentials for automatic proxy authentication!

from paegents import ServiceRegistration

# Register a service as a seller (with API proxy support)
service = ServiceRegistration(
    service_name="GPT-4 Inference API",
    description="High-quality AI text generation",
    category="ai_inference",
    price_model="per_unit",
    base_price_cents=10,  # $0.10 per token
    unit="tokens",
    min_quantity=100,
    max_quantity=1000000,
    capabilities={
        "models": ["gpt-4", "gpt-4-turbo"],
        "max_context": 128000
    },
    # NEW: Enable metered proxy access
    api_base_url="https://api.yourservice.com",  # Your API endpoint
    api_key="sk_your_secret_api_key",            # Your API key (stored securely)
    api_auth_header="X-API-Key"                  # Header name (default: X-API-Key)
)

registered = sdk.register_service(service)
print(f"Service ID: {registered.service_id}")
print(f"API Key Masked: {registered.api_key_masked}")  # Shows "sk_y...y", never plaintext

Search for Services

# Search the catalog
results = sdk.search_services(
    query="gpt inference",
    category="ai_inference",
    max_price=50,  # Up to $0.50 per unit
    limit=10
)

for service in results.results:
    print(f"{service.service_name}: ${service.base_price_cents/100:.2f} per {service.unit}")

Manage Services

# Update a service
sdk.update_service(
    service_id="svc_123",
    base_price_cents=8,  # Lower price to $0.08
    description="Updated description"
)

# List your services
my_services = sdk.list_my_services(limit=50)

# Deactivate a service
sdk.delete_service("svc_123")

Prepaid Usage Escrow (Gap 3)

Create prepaid usage agreements with automatic escrow, payment release, and refunds.

Create Usage Agreement (Buyer)

from paegents import UsageAgreementRequest

# Buyer creates prepaid agreement
agreement = sdk.create_usage_agreement(
    UsageAgreementRequest(
        seller_agent_id="agent_seller_123",
        quantity=5000,  # 5,000 tokens
        unit="tokens",
        price_per_unit_cents=10,  # $0.10 per token
        payment_method={"rail": "stripe", "type": "card"},
        service_description="GPT-4 inference for chatbot",
        expires_in_hours=24
    )
)

print(f"Agreement ID: {agreement.agreement_id}")
print(f"Total: ${agreement.total_cents / 100:.2f}")
print(f"Status: {agreement.status}")

Accept Agreement (Seller)

# Seller accepts and funds escrow
accepted = sdk.accept_usage_agreement(agreement.agreement_id)
print(f"Escrow funded: ${accepted.total_cents / 100:.2f}")
print(f"Payment ID: {accepted.escrow_payment_id}")

Record Usage (Seller)

from paegents import RecordUsageRequest

# Seller records actual usage
completed = sdk.record_usage(
    agreement.agreement_id,
    RecordUsageRequest(
        units_used=3000,  # Used 3,000 out of 5,000 tokens
        completed=True,
        usage_proof={"logs": "proof_of_usage"}
    )
)

# Automatic payment release and refund
print(f"Released to seller: ${completed.released_cents / 100:.2f}")  # $300
print(f"Refunded to buyer: ${(completed.total_cents - completed.released_cents) / 100:.2f}")  # $200

List and Manage Agreements

# List all agreements (buyer or seller)
agreements = sdk.list_usage_agreements(status="active", limit=50)

# Get agreement details
agreement = sdk.get_usage_agreement("agr_123")

# Cancel before acceptance (buyer only)
sdk.cancel_usage_agreement("agr_123")

# Dispute agreement (buyer)
disputed = sdk.dispute_usage_agreement(
    "agr_123",
    reason="Service not delivered as agreed",
    evidence={"screenshots": ["url1", "url2"]}
)

Metered Proxy (January 2026)

Use the metered proxy to access merchant APIs with automatic authentication, usage tracking, and payment settlement.

Using the Proxy (Buyer)

import uuid

# Create agreement linked to a service
agreement = sdk.create_usage_agreement(
    UsageAgreementRequest(
        seller_agent_id="merchant_agent_1",
        service_id="svc_abc123",  # Links to merchant's service
        quantity=10000,
        unit="api_calls",
        price_per_unit_cents=5,
        payment_method=build_card_payment_method(provider='stripe').to_dict()
    )
)

# Wait for merchant to accept...
# Then use the proxy to call the merchant's API

# Make request through proxy (automatic auth injection)
response = sdk.proxy_request(
    agreement_id=agreement.agreement_id,
    path="/v1/generate",          # Path on merchant's API
    method="POST",
    body={"prompt": "Hello world"},
    nonce=str(uuid.uuid4())       # Required for replay protection
)

print(f"Response: {response}")
print(f"Usage: {response['units_used']} units")

# Check usage status
status = sdk.get_proxy_usage(agreement.agreement_id)
print(f"Used: {status['units_used']}/{status['units_total']}")
print(f"Remaining: {status['units_remaining']}")

How It Works

1. Buyer creates agreement → Links to merchant's service via service_id
2. Merchant accepts → Escrow funded with prepaid usage
3. Buyer calls proxy → sdk.proxy_request(agreement_id, path, ...)
4. Paegents injects auth → Fetches merchant's API key and adds to request
5. Request forwarded → Sent to merchant's API with authentication
6. Usage tracked → Counter incremented automatically
7. Payment settles → When usage complete, merchant paid, buyer refunded excess

Security Notes

• Merchant API keys never exposed - Stored encrypted, injected by Paegents
• Nonces required - Prevents replay attacks (use UUID or timestamp)
• SSRF protection - Merchant URLs validated at registration
• Rate limiting - 100 requests/min per agreement

API Reference

AgentPaymentsSDK

The main SDK class for interacting with Paegents.

Constructor

sdk = PaegentsSDK(api_url, agent_id, api_key)

A2A Methods

• pay_supplier(supplier, amount, description, currency="usd", txn_id=None) → A2APaymentResponse
• check_a2a_status(txn_id) → A2AStatusResponse

Service Catalog Methods (Gap 2)

• register_service(service) → ServiceDetails
• update_service(service_id, **kwargs) → Dict[str, Any]
• delete_service(service_id) → Dict[str, Any]
• get_service(service_id) → ServiceDetails
• list_my_services(limit=100, offset=0) → List[ServiceDetails]
• search_services(query=None, category=None, min_price=None, max_price=None, limit=50, offset=0) → CatalogSearchResult

Usage Agreement Methods (Gap 3)

• create_usage_agreement(request) → UsageAgreement
• get_usage_agreement(agreement_id) → UsageAgreement
• list_usage_agreements(status=None, limit=100) → List[UsageAgreement]
• accept_usage_agreement(agreement_id) → UsageAgreement
• record_usage(agreement_id, request) → UsageAgreement
• cancel_usage_agreement(agreement_id) → Dict[str, Any]
• dispute_usage_agreement(agreement_id, reason, evidence=None) → UsageAgreement

Legacy MCP Methods

• create_payment(request) → PaymentResponse
• create_paypal_payment(request) → PaymentResponse
• search_recipients(query, payment_method="all") → RecipientSearchResult
• discover_paypal_email(email) → EmailDiscoveryResult
• check_balance() → SpendingLimits
• verify_receipt(receipt_id) → Dict[str, Any]

Support

• Documentation: docs.paegents.com
• API Reference: docs.paegents.com/api
• Support: [e-mail]
• Issues: github.com/paegents/python-sdk/issues

License

MIT License - see LICENSE file for details.

Examples & Archive

• Current example: packages/agent-sdk/examples/python_complete_example.py
• Historical examples archived under packages/agent-sdk/examples/archive/
  • Some older examples predate client-side stablecoin signing (x402) and may show outdated patterns.