Create Plans & Agents

Once you have a Payments instance, you can start creating Payment Plans and AI Agents.

Creating a Payment Plan

Payment Plans give AI Builders the ability to control how and when users can use an AI agent or service. They are entirely controlled and managed by the AI Builder that creates them with no interference from Nevermined. Nevermined Payment Plans enable the setup of time-based or request-based gating of a Builder’s AI.

Request-Based or Credits-Based: Provides user access with request-gating. Builders can set the target price per request by configuring how many credits each API call consumes. This allows you to control costs based on computational complexity - for example, a simple query might cost 1 credit while a complex analysis could cost 5 credits. When adding services to a Payment Plan, you define the number of credits required per request. Each time a request is made, Nevermined will redeem the specified number of credits. If the user does not have enough credits, they will be prompted to purchase more and denied access until they do.
Time-Based: Provides user access with time-gating. Builders can set the time period that a user is allowed access to the AI (e.g., 1 year, 1 month, 1 week, 1 day, 1 hour, etc.). When a user makes a request, the corresponding access credit is redeemed, granting access for the designated period. Once the time period has elapsed, the user will no longer have access and will need to redeem another credit for continued access.

Creating a Credit-Based Payment Plan

TypeScript
Python

const USDC_ERC20_TESTING = '0x036CbD53842c5426634e7929541eC2318f3dCF7e' // This is the USDC ERC20 address in the test network (sandbox)

const planMetadata = {
  name: 'My Credits Plan',
  tags: ['test']
}

// The price is 20 USDC (20_000_000) in the sandbox network
const priceConfig = getERC20PriceConfig(20_000_000n, USDC_ERC20_TESTING, builderAddress)
// The subscriber receives 100 credits upon purchasing the plan
const creditsConfig = getFixedCreditsConfig(100n)
// Register the plan
const { planId } = await payments.plans.registerCreditsPlan(
  planMetadata, 
  priceConfig, 
  creditsConfig
)

# This is the USDC ERC20 address in the test network (sandbox)
USDC_ERC20_TESTING = "0x036CbD53842c5426634e7929541eC2318f3dCF7e"

# Plan metadata
plan_metadata = PlanMetadata(
    name="My Credits Plan",
    tags=["test"]
)

# The price is 20 USDC (20_000_000) in the sandbox network
price_config = get_erc20_price_config(20_000_000, USDC_ERC20_TESTING, builder_address)
# The subscriber receives 100 credits upon purchasing the plan
credits_config = get_fixed_credits_config(100)

# Register the plan
response = payments_builder.plans.register_credits_plan(
    plan_metadata,
    price_config,
    credits_config
)
plan_id = response.get("planId")

Creating a Time-Based Payment Plan

TypeScript
Python

// The price is 5 USDC (5_000_000) in the sandbox network
const priceConfig = getERC20PriceConfig(5_000_000n, ERC20_ADDRESS, builderAddress)
// The plan is valid for 1 day
const oneDayPlanConfig = getExpirableDurationConfig(ONE_DAY_DURATION)
// Register the plan
const { planId } = await payments.plans.registerTimePlan(
  planMetadata, 
  priceConfig, 
  oneDayPlanConfig
)

# The price is 5 USDC (5_000_000) in the sandbox network
price_config = get_erc20_price_config(5_000_000, ERC20_ADDRESS, builder_address)
# The plan is valid for 1 day
one_day_plan_config = get_expirable_duration_config(ONE_DAY_DURATION)
# Register the plan
response = payments_builder.plans.register_time_plan(
    plan_metadata,
    price_config,
    one_day_plan_config
)
plan_id = response.get("planId")

Creating a Trial Plan

A Trial Plan is a special type of Payment Plan that allows users to try out an AI Agent for a limited time (typically for free). A Trial Plan can only be obtained once by each user.

TypeScript
Python

const trialPlanMetadata: PlanMetadata = {
  name: 'Try it for one day before you buy it',
}
// The price is free
const freeConfig = getFreePriceConfig()
// The plan is valid for 1 day
const oneDayPlanConfig = getExpirableDurationConfig(ONE_DAY_DURATION)
// Register the trial plan
const { planId } = await payments.plans.registerTimeTrialPlan(
  trialPlanMetadata, 
  freeConfig, 
  oneDayPlanConfig
)

# Plan metadata for the trial plan
trial_plan_metadata = PlanMetadata(
    name="Try it for one day before you buy it"
)

# The price is free
free_config = get_free_price_config()
# The plan is valid for 1 day
one_day_plan_config = get_expirable_duration_config(ONE_DAY_DURATION)
# Register the trial plan
response = payments_builder.plans.register_time_trial_plan(
    trial_plan_metadata,
    free_config,
    one_day_plan_config
)
plan_id = response.get("planId")

Creating an AI Agent

Before creating an AI Agent, you need to have a Payment Plan created.

API Endpoint Configuration

When creating an agent, you need to specify:

HTTP methods and URL patterns that the agent exposes and are protected by the Payment Plan
Wildcard support - You can use wildcards (like :agentId) to match dynamic URL segments
Open endpoints - Specify any endpoints that should remain free (like documentation or health checks)

URL patterns support wildcards following the path-to-regexp specification.

TypeScript
Python

const agentMetadata: AgentMetadata = {
  name: 'E2E Payments Agent',
  tags: ['test'],
  dateCreated: new Date(),
  description: 'Description for the E2E Payments Agent'
}
const agentApi = {
  endpoints: [
    { 'POST': 'https://example.com/api/v1/agents/:agentId/tasks' },
    { 'GET': 'https://example.com/api/v1/agents/:agentId/tasks/invoke' }
  ],
  openEndpoints: ['https://example.com/api/v1/rest/docs-json']
}
const paymentPlans = [creditsPlanId, expirablePlanId]

const { agentId } = await payments.agents.registerAgent(
  agentMetadata, 
  agentApi, 
  paymentPlans
)

from datetime import datetime

agent_metadata = {
    "name": "E2E Payments Agent",
    "tags": ["test"],
    "dateCreated": datetime.now().isoformat(),
    "description": "Description for the E2E Payments Agent"
}
agent_api = {
    "endpoints": [
        {"POST": "https://example.com/api/v1/agents/:agentId/tasks"},
        {"GET": "https://example.com/api/v1/agents/:agentId/tasks/invoke"}
    ],
    "openEndpoints": ["https://example.com/api/v1/rest/docs-json"]
}
payment_plans = [credits_plan_id, expirable_plan_id]

response = payments_builder.agents.register_agent(
    agent_metadata,
    agent_api,
    payment_plans
)
agent_id = response.get("agentId")

Creating a Payment Plan and AI Agent Together

This method allows you to create the plan and attach the agent to it in one step.

TypeScript
Python

const agentMetadata = { 
  name: 'My AI Payments Agent', 
  tags: ['test2'], 
  description: 'Description for my AI Payments Agent' 
}
const agentApi = { endpoints: [{ 'POST': 'http://example.com/test/:agentId/tasks' }] }

const cryptoPriceConfig = getNativeTokenPriceConfig(500n, builderAddress)
// Non expirable payment plan
const nonExpirableConfig = getNonExpirableDurationConfig()

const { agentId, planId } = await paymentsBuilder.agents.registerAgentAndPlan(
  agentMetadata,
  agentApi,
  planMetadata,
  cryptoPriceConfig,
  nonExpirableConfig,
)

# Agent metadata and API definition
agent_metadata = {
    "name": "My AI Payments Agent",
    "tags": ["test2"],
    "description": "Description for my AI Payments Agent"
}
agent_api = {
    "endpoints": [
        {"POST": "http://example.com/test/:agentId/tasks"}
    ]
}

# The price is 500 native tokens
crypto_price_config = get_native_token_price_config(500, builder_address)
# Non expirable payment plan
non_expirable_config = get_non_expirable_duration_config()

response = payments_builder.agents.register_agent_and_plan(
    agent_metadata,
    agent_api,
    plan_metadata,
    crypto_price_config,
    non_expirable_config
)
agent_id = response.get("agentId")
plan_id = response.get("planId")
print('Plan created', response.planDID)
print('Agent attached', response.agentDID)

Key Concepts

Endpoint Protection

When creating an AI Agent, you specify:

Protected Endpoints: Require payment/subscription to access
Open Endpoints: Free to access (e.g., documentation, health checks)
URL Patterns: Support wildcards for dynamic routing

Payment Plan Types

Credits-Based

Users pay for a specific number of credits. Each request consumes credits based on your configuration.

Time-Based

Users get unlimited access for a specific time period (hours, days, months).

Trial Plans

Free access for limited time or credits to let users test your service.

Best Practices

Plan Naming

Use descriptive names that clearly indicate what the plan offers (e.g., “Basic API Access - 1000 requests”).

Pricing Strategy

Start with competitive pricing and adjust based on usage patterns and user feedback.

Endpoint Design

Group related functionality under the same payment plan to provide better value to subscribers.

Trial Plans

Always offer trial plans to reduce barriers to entry and increase conversion rates.

Next Steps

Once you have created your payment plans and agents, you can:

Test Purchasing

Learn how users purchase your payment plans

Handle Requests

Implement request validation in your AI agent

Getting Started

Integration Guide

Creating a Payment Plan

Creating a Credit-Based Payment Plan

Creating a Time-Based Payment Plan

Creating a Trial Plan

Creating an AI Agent

API Endpoint Configuration

Creating a Payment Plan and AI Agent Together

Key Concepts

Endpoint Protection

Payment Plan Types

Credits-Based

Time-Based

Trial Plans

Best Practices

Next Steps

Test Purchasing

Handle Requests

​Creating a Payment Plan

​Creating a Credit-Based Payment Plan

​Creating a Time-Based Payment Plan

​Creating a Trial Plan

​Creating an AI Agent

​API Endpoint Configuration

​Creating a Payment Plan and AI Agent Together

​Key Concepts

​Endpoint Protection

​Payment Plan Types

Credits-Based

Time-Based

Trial Plans

​Best Practices

​Next Steps

Test Purchasing

Handle Requests

Creating a Payment Plan

Creating a Credit-Based Payment Plan

Creating a Time-Based Payment Plan

Creating a Trial Plan

Creating an AI Agent

API Endpoint Configuration

Creating a Payment Plan and AI Agent Together

Key Concepts

Endpoint Protection

Payment Plan Types

Best Practices

Next Steps