Pre-subscription Requirements
Anthropic Account Preparation
Register an account on the Anthropic official website
Complete email verification and profile setup
Network Environment
Use a US Residential IP (Critical Success Factor)
Ensure the IP is clean and geolocated in the US
MPChat Funds Preparation
Prepare $100-200 equivalent in USDT (Anthropic API is pay-as-you-go)
Ensure sufficient funds for initial API call costs
Detailed Steps
Phase 1: MPChat Virtual Card Preparation
Deposit USDT
Path: MPChat App → Wallet → Deposit
Copy the USDT deposit address
Transfer USDT from an external wallet ($150+ recommended)
Wait for network confirmation
Apply for a US MPCard
Path: MPChat App → MPCard → Apply for New Card
Issuer Country: Must select "United States"
Card Type: Virtual Card (Instant generation)
Securely record the Card Number, Expiry, and CVV
Transfer Funds
Path: MPChat App → Wallet → Transfer
From: MP Wallet (USDT)
To: MPCard (USD)
Amount: $100-120 (As initial deposit)
Phase 2: Anthropic Registration & API Application
Register Anthropic Account
Visit anthropic.com
Click "Sign Up" to register
Use a corporate email address (Recommended)
Apply for API Access
Log in and go to "Console" or "API Access"
Click "Apply for API Access"
Fill in usage scenarios and purpose:
Company/Project Name
Usage scenario description
Expected usage volume
Tech stack information
Wait for Approval
Anthropic typically takes 1-3 business days for review
Receive an email notification once access is granted
Phase 3: Payment Information Setup
Enter Payment Settings
Log in to the Anthropic Console
Navigate to "Billing" or "Payment Methods"
Click "Add Payment Method"
MPCard Details
Source: MPChat App → MPCard → Card Details
Card Number: 16-digit virtual card number
Expiration Date: Expiry (MM/YY)
CVV Code: 3-digit security code
Cardholder Name: Pinyin or English name recommended
Billing Address (Critical Step)
Country: United States
Use a professional US address generator
Example format:
Address Line 1: 1234 AI Research Park
City: San Francisco
State: CA
ZIP Code: 94102
Phone: Generate a US phone number
Verification & API Activation
Instant Verification: Anthropic performs a small authorization charge (refunded) to verify card/address validity
Obtain API Key: After verification, go to "API Keys", click "Generate New Key", and save it securely (only shown once)
Function Verification
Perform a test call using the API key
Verify access to Claude models
Check usage statistics features
Anthropic API Pricing
Model Version | Input Price | Output Price | Use Case |
Claude 3 Opus | $15 / million tokens | $75 / million tokens | Complex tasks |
Claude 3 Sonnet | $3 / million tokens | $15 / million tokens | Balanced performance |
Claude 3 Haiku | $0.25 / million tokens | $1.25 / million tokens | Simple tasks |
Troubleshooting Guide
Common Payment Failures
Region detection failed (Solution: Use US residential IP; clear cache)
Strict address validation (Solution: Use a real, existing US address)
API Application Denied
Solution: Provide detailed and authentic usage descriptions
Use a corporate email to increase credibility
API Calling Issues
Invalid API Key (Check copying; ensure Billing status is "Active"; regenerate key)
Quota Exceeded (Monitor via Billing → Usage; set alerts; top up in time)
Account Management Guide
Usage Monitoring
Real-time Stats: View usage in the Console
Cost Forecasting: Predict monthly costs based on patterns
Alert Settings: Set usage threshold alerts
Payment Management
Auto-pay: Default pay-as-you-go billing
Top-up Reminders: Set low balance notifications
Invoices: Download detailed invoices from the Console
Cost Optimization
Model Selection: Choose the right model for task complexity
Prompt Optimization: Reduce token consumption via better prompts
Batch Processing: Lower costs by batching requests
Caching: Use result caching to avoid redundancy
Security Reminders
API Key Protection: Never leak your key
MPCard Protection: Set reasonable spending limits
Usage Monitoring: Regularly check API logs
Anthropic API Usage Example
Python
import anthropic def call_claude_api(api_key, prompt, model="claude-3-sonnet-20240229"): client = anthropic.Anthropic(api_key=api_key) message = client.messages.create( model=model, max_tokens=1000, temperature=0, messages=[{"role": "user", "content": prompt}] ) return message.content # Usage Example api_key = "YOUR_ANTHROPIC_API_KEY" prompt = "Please explain the basic concepts of AI." response = call_claude_api(api_key, prompt) print(response)Technical Specifications
API Endpoint: https://api.anthropic.com
Request Format: JSON
Response Format: JSON
Authentication: X-API-Key Header
Rate Limits: Varies by account tier
Supported Features
Multi-turn Dialogue: Supports complex interactions
File Processing: Supports document uploads
Streaming Responses: Real-time stream output
Tool Use: Supports calling external tools and functions
Best Practices
Clear Prompts: Provide specific and clear instructions
Reasonable Temperature: Adjust creativity based on task needs
Token Management: Monitor and optimize usage
Error Handling: Implement robust error handling mechanisms
By following this guide, you can successfully activate Anthropic API services using an MPChat card. Due to strict review, using a corporate email and providing detailed use cases is highly recommended.