Windsurf API setupCascade Claude
Windsurf Cascade + Claude API Setup with CallAI
Configure Windsurf / Cascade to use CallAI Base URL for Claude 3.7 and DeepSeek coding agents.
Read more →Technical guides & reviews
Developer guides
Cursor / Claude Code setup, OpenAI-compatible clients, crypto billing, model pricing, and DataForSEO.
DeepSeek 503DeepSeek server busy
DeepSeek API 503 / Server Busy — Fixes & HA Proxy
What causes DeepSeek 503s and how CallAI’s multi-node pool keeps R1/V3 available for production traffic.
Read more →GEO AI searchllms.txt guide
GEO & llms.txt Guide — Optimize for AI Search Engines
Generative engine optimization basics: GPTBot/ClaudeBot robots rules, llms.txt, and FAQ/JSON-LD fact sheets.
Read more →Cursor 403 fixCursor 401 Unauthorized
Cursor API 403 / 401 Fix Guide (Base URL & Proxy)
Diagnose Cursor connection failures: TUN mode, Direct rules for api.callaiapi.com, and API key format checks.
Read more →Cherry Studio APIOpen WebUI custom OpenAI
Cherry Studio & Open WebUI — Claude via CallAI
Connect Cherry Studio and Open WebUI to CallAI for Claude 3.7 / GPT-4o with a single OpenAI-compatible key.
Read more →Claude 3.7 pricingClaude API cost calculator
Claude 3.7 Sonnet API Pricing Calculator & Cost Tips
Estimate Claude 3.7 input/output and thinking token costs on CallAI, plus prompt caching savings.
Read more →Vultr USDTDigitalOcean without credit card
Buy Vultr / DigitalOcean VPS with USDT via CallAI
Provision cloud VPS without a foreign card. Live catalog, region GEO picks, and 25-minute watchdog refunds.
Read more →Google SERP APISEO data API
Google SERP API Guide — SEO Data via DataForSEO Proxy
Scrape Google organic results through CallAI’s DataForSEO proxy. Live SERP payloads and Python examples.
Read more →DeepSeek R1 APIDeepSeek V3 API
DeepSeek R1 / V3 High-Availability API via CallAI
Avoid upstream 503s with CallAI’s DeepSeek pool. Full R1 weights, V3 chat, and OpenAI SDK compatibility.
Read more →USDT AI API top-upTRC20 CallAI
USDT-TRC20 Top-Up Security Guide for AI API Billing
How CallAI USDT deposits work, minimum $1 funding, and best practices for safe on-chain top-ups.
Read more →o3-mini APIo1 reasoning API
o1 / o3-mini Reasoning API Tutorial on CallAI
Call OpenAI reasoning models through CallAI’s OpenAI-compatible endpoint. Tips on reasoning_effort and timeouts.
Read more →LangChain OpenAI proxyLlamaIndex base_url
LangChain & LlamaIndex — Python OpenAI Proxy to CallAI
Point LangChain / LlamaIndex OpenAI clients at CallAI for Claude, DeepSeek, and GPT models in Python apps.
Read more →Cline API setupRoo Code OpenAI
VS Code Cline / Roo Code — CallAI API Key Setup
Configure Cline and Roo Code extensions with CallAI Base URL and models for agentic coding in VS Code.
Read more →Dify custom modelFastGPT OpenAI
Dify & FastGPT Custom Model API — OpenAI-Compatible Gateway
Wire Dify / FastGPT agents to CallAI for Claude, GPT-4o, and DeepSeek with standard OpenAI provider settings.
Read more →Claude Code CLIANTHROPIC_BASE_URL
Claude Code CLI Setup — ANTHROPIC_BASE_URL via CallAI
Redirect Anthropic’s Claude Code CLI to CallAI with environment variables. Use Claude 3.7 Sonnet without a foreign card.
Read more →DataForSEO proxySERP API
DataForSEO API Proxy Guide — SERP, Keywords & Backlinks
Call DataForSEO through CallAI with shared wallet balance. SERP live queries, keyword CPC, and free task_get polling.
Read more →NextChat custom APILobeChat Base URL
NextChat, LobeChat & Cherry Studio — Custom OpenAI Base URL
Point popular open-source chat clients at https://api.callaiapi.com/v1 and use Claude 3.7 / GPT-4o with one CallAI key.
Read more →AI API gatewayOpenRouter alternative
Best AI API Gateway for Claude & GPT — Pay with USDT
Why teams pick CallAI: one OpenAI base URL, Claude/GPT/DeepSeek routing, USDT top-ups, and pay-as-you-go metering.
Read more →Cursor API setupCursor Claude 3.7
Cursor + Claude 3.7 / DeepSeek Setup Guide (2026) — No Credit Card
Configure Cursor with CallAI’s OpenAI-compatible Base URL. Stream Claude 3.7 Sonnet, DeepSeek R1, and GPT-4o with .cursorrules tips and 403 troubleshooting.
Read more →OpenAI API without credit cardUSDT AI API
Use OpenAI-Compatible APIs Without a Foreign Credit Card
Fund Claude, GPT-4o, and DeepSeek through CallAI with USDT from $1. No overseas card, OpenAI SDK drop-in base_url swap.
Read more →Claude vs GPT pricingClaude 3.7 API price
Claude vs GPT Pricing 2026 — Real $/1M Token Costs
Side-by-side Claude 3.7 Sonnet and GPT-4o pricing on CallAI, including prompt caching and when each model wins on cost.
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