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Payment Plans

This guide covers how to create and manage payment plans using the Nevermined Payments Python SDK.

Overview

Payment Plans define how users pay to access your AI agents and services. Nevermined supports two types of plans:

  • Credits Plans: Users purchase a fixed number of credits that are consumed with each request
  • Time Plans: Users purchase access for a specific duration (e.g., 1 day, 1 month)

Plans API

Access the Plans API through payments.plans:

from payments_py import Payments, PaymentOptions

payments = Payments.get_instance(
    PaymentOptions(nvm_api_key="nvm:your-key", environment="sandbox")
)

# Access plans API
plans_api = payments.plans

Types of Payment Plans

Credits Plans

Credits plans grant users a fixed number of credits. Each agent request consumes credits according to the plan configuration.

from payments_py.common.types import PlanMetadata
from payments_py.plans import get_erc20_price_config, get_fixed_credits_config

# Plan metadata
plan_metadata = PlanMetadata(
    name="Basic Plan",
    description="100 credits for AI agent access"
)

# Price: 20 tokens (ERC20)
price_config = get_erc20_price_config(
    amount=20,
    token_address="0xYourERC20TokenAddress",
    receiver="0xYourWalletAddress"
)

# Credits: 100 credits, 1 credit per request
credits_config = get_fixed_credits_config(
    credits_granted=100,
    credits_per_request=1
)

# Register the plan
result = payments.plans.register_credits_plan(
    plan_metadata=plan_metadata,
    price_config=price_config,
    credits_config=credits_config
)
print(f"Plan ID: {result['planId']}")

Time Plans

Time plans grant users unlimited access for a specific duration:

from payments_py.plans import get_expirable_duration_config, ONE_DAY_DURATION

# Price configuration
price_config = get_erc20_price_config(
    amount=50,
    token_address="0xYourERC20TokenAddress",
    receiver="0xYourWalletAddress"
)

# Duration: 1 day
credits_config = get_expirable_duration_config(ONE_DAY_DURATION)

result = payments.plans.register_time_plan(
    plan_metadata=PlanMetadata(name="Daily Plan"),
    price_config=price_config,
    credits_config=credits_config
)

Trial Plans

Trial plans can only be purchased once per user. Perfect for free trials:

from payments_py.plans import get_free_price_config

# Free trial with 10 credits
price_config = get_free_price_config()
credits_config = get_fixed_credits_config(credits_granted=10)

result = payments.plans.register_credits_trial_plan(
    plan_metadata=PlanMetadata(name="Free Trial", description="10 free credits"),
    price_config=price_config,
    credits_config=credits_config
)

# Free trial with 1 day access
credits_config = get_expirable_duration_config(ONE_DAY_DURATION)

result = payments.plans.register_time_trial_plan(
    plan_metadata=PlanMetadata(name="1-Day Trial"),
    price_config=get_free_price_config(),
    credits_config=credits_config
)

Price Configuration

ERC20 Token Price

from payments_py.plans import get_erc20_price_config

price_config = get_erc20_price_config(
    amount=100,                           # Amount in token units
    token_address="0xTokenAddress",       # ERC20 token contract
    receiver="0xBuilderAddress"           # Payment receiver
)

Native Token Price (ETH)

from payments_py.plans import get_native_token_price_config

price_config = get_native_token_price_config(
    amount=1000000000000000,  # Amount in wei (0.001 ETH)
    receiver="0xBuilderAddress"
)

Fiat Price (USD)

from payments_py.plans import get_fiat_price_config

price_config = get_fiat_price_config(
    amount=999,  # $9.99 in cents
    receiver="0xBuilderAddress"
)

Free Price

from payments_py.plans import get_free_price_config

price_config = get_free_price_config()

Credits Configuration

Fixed Credits

Each request consumes a fixed number of credits:

from payments_py.plans import get_fixed_credits_config

credits_config = get_fixed_credits_config(
    credits_granted=100,      # Total credits granted
    credits_per_request=1     # Credits consumed per request
)

Dynamic Credits

Each request can consume a variable number of credits:

from payments_py.plans import get_dynamic_credits_config

credits_config = get_dynamic_credits_config(
    credits_granted=100,
    min_credits_per_request=1,   # Minimum credits per request
    max_credits_per_request=10   # Maximum credits per request
)

Duration-Based (Time Plans)

from payments_py.plans import (
    get_expirable_duration_config,
    get_non_expirable_duration_config,
    ONE_DAY_DURATION,
    ONE_WEEK_DURATION,
    ONE_MONTH_DURATION,
    ONE_YEAR_DURATION
)

# Expirable (time-limited)
credits_config = get_expirable_duration_config(ONE_MONTH_DURATION)

# Non-expirable (permanent access)
credits_config = get_non_expirable_duration_config()

Retrieve Plans

Get a Single Plan

plan = payments.plans.get_plan(plan_id="123456")
print(f"Plan name: {plan['name']}")
print(f"Plan type: {plan['planType']}")

Get Plan Balance

Check the balance for a specific account:

balance = payments.plans.get_plan_balance(
    plan_id="123456",
    account_address="0xUserAddress"  # Optional, defaults to current user
)
print(f"Balance: {balance.balance} credits")
print(f"Is subscriber: {balance.is_subscriber}")

Get Agents Associated to a Plan

from payments_py.common.types import PaginationOptions

agents = payments.plans.get_agents_associated_to_plan(
    plan_id="123456",
    pagination=PaginationOptions(page=1, offset=10)
)
print(f"Agents: {agents}")

Complete Example

from payments_py import Payments, PaymentOptions
from payments_py.common.types import PlanMetadata
from payments_py.plans import (
    get_erc20_price_config,
    get_fixed_credits_config,
    get_expirable_duration_config,
    get_free_price_config,
    ONE_DAY_DURATION
)

# Initialize
payments = Payments.get_instance(
    PaymentOptions(nvm_api_key="nvm:your-key", environment="sandbox")
)
builder_address = payments.account_address

# ERC20 token address (use a test token in sandbox)
ERC20_TOKEN = "0x75faf114eafb1BDbe2F0316DF893fd58CE46AA4d"

# 1. Create a credits plan
credits_plan = payments.plans.register_credits_plan(
    plan_metadata=PlanMetadata(name="Basic Credits Plan"),
    price_config=get_erc20_price_config(20, ERC20_TOKEN, builder_address),
    credits_config=get_fixed_credits_config(100)
)
print(f"Credits Plan: {credits_plan['planId']}")

# 2. Create a time plan
time_plan = payments.plans.register_time_plan(
    plan_metadata=PlanMetadata(name="Monthly Plan"),
    price_config=get_erc20_price_config(50, ERC20_TOKEN, builder_address),
    credits_config=get_expirable_duration_config(ONE_DAY_DURATION)
)
print(f"Time Plan: {time_plan['planId']}")

# 3. Create a free trial
trial_plan = payments.plans.register_credits_trial_plan(
    plan_metadata=PlanMetadata(name="Free Trial"),
    price_config=get_free_price_config(),
    credits_config=get_fixed_credits_config(10)
)
print(f"Trial Plan: {trial_plan['planId']}")

# 4. Retrieve plan details
plan_details = payments.plans.get_plan(credits_plan['planId'])
print(f"Plan details: {plan_details}")

Next Steps