Errors

AI API error troubleshooting

Use these notes to diagnose API proxy errors by code, likely cause, and the next check to run before switching providers or changing your setup.

Network 503

Claude Code / Codex 503 No available accounts

Do not rotate keys first. This error usually points to an unavailable account pool, provider, group, or model route. Test a minimal request, confirm the model and group, then decide whether to wait, reduce context, change model, or switch provider.

#claude code 503 no available accounts #codex 503 no available accounts #503 no available accounts
Model model_at_capacity

Codex: Selected model is at capacity.

Error: Selected model is at capacity. Please try a different model. Treat it as model-level capacity, admission, or streaming interruption first. It can happen with ChatGPT-authenticated Codex CLI, proxy account pools, or Sub2API upstream overloaded passthrough.

#selected model is at capacity #codex selected model is at capacity #codex model at capacity
Model

Codex warning: Your conversation has multiple possible cybersecurity risk flags

Warning: Your conversation has multiple possible cybersecurity risk flags. Treat it as an OpenAI/Codex safety-routing signal first, then check whether an API proxy, sensitive keywords, long code context, or opaque model routing is making it worse.

#codex cybersecurity risk flags #your conversation has multiple possible cybersecurity risk flags #trusted access for cyber
Rate limit 429

Error 429 Too Many Requests for AI API proxies

Error: exceeded retry limit, last status: 429 Too Many Requests, request id: <request-id>. With an AI API proxy, repeated 429s usually mean the upstream account pool is rate limited, cooling down, or out of usable quota. Ask the provider to switch account, route, or model first.

#error 429 #429 too many requests #openai api 429
Authentication 401

Error 401 Unauthorized for AI API proxies

A 401 is an authentication failure. Check which key is loaded, which Base URL receives the request, whether the header format is correct, and whether the key is still active for that provider.

#error 401 #401 unauthorized #openai api 401
Model 529

Claude Code API Error: 529 Overloaded: How to Fix Opus 5 Service Busy

For API Error: 529 Overloaded, check status.claude.com, then wait, reduce concurrency, or switch models. Anthropic has not linked the Opus 5 incident to the alleged German payment loophole.

#api error 529 overloaded #claude code 529 overloaded #opus 5 529 overloaded
Network 503

Codex unexpected status 503 Service Unavailable: biscuit_baker_service_me_circuit_open

This 503 is usually server-side, not a bad API key. Pause repeated retries and troubleshoot locally only if OpenAI reports no incident.

#codex unexpected status 503 service unavailable #biscuit_baker_service_me_circuit_open #codex auth error 503

Featured AI API providers

Explore representative providers across top-up value, official price discounts, and CCNavX popularity.

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Top-up value BMCCA logo BMCCA BMCCA is a Sub2API-based AI API proxy covering Claude and GPT models, with usage-based top-ups, subscription cards, Alipay payment, redeem codes, and referral rebates. $0.01 ≈ $1 platform credit Min top-up $1 Subscription plan USDT The blended reference rate is about ¥0.13 per $1 credit. BMCCA supports usage-based top-ups and daily, weekly, and monthly plans; usage-based top-ups provide $6.75 credit per ¥1, about ¥0.148 per $1 credit, while Monthly Card 2 costs ¥169.99 for a 30-day $2,400 limit, about ¥0.071 per $1 monthly credit, usable for Claude, Gemini, and Imagen. Open site
Official discount Xclis.ai logo Xclis.ai Xclis.ai is a multi-model AI API proxy with Japan and US endpoints for Claude Code, Codex, GPT, and Gemini. It uses pay-as-you-go billing, supports Alipay, Stripe, cards, and crypto payments, and offers referral rebates. About 97% off on average Min top-up $1 Usage-based USDT Claude averages 2.2% of official pricing, as low as 2.1% of official pricing; GPT averages 3.4% of official pricing, as low as 1.7% of official pricing. Usage is billed per 1M tokens with no monthly fee; prices use each model's lowest current complete public group. The minimum top-up is $1 and balances do not expire. Open site
CCNavX popularity WoKeyAI logo WoKeyAI Wokey aggregates unused AI subscription capacity into usage-based APIs compatible with OpenAI Chat Completions and Anthropic Messages, covering Claude, GPT, Gemini, and Grok models with Alipay, USDT, and USDC top-ups. About 75% off on average Min top-up $1 Usage-based USDT Claude averages 17.4% of official pricing, as low as 15% of official pricing; GPT averages 17.9% of official pricing, as low as 5% of official pricing; Grok averages 20% of official pricing, as low as 20% of official pricing; DeepSeek averages 40% of official pricing, as low as 40% of official pricing; Kimi averages 30% of official pricing, as low as 30% of official pricing. Input, output, and cache rates are public per 1M tokens and fluctuate with network load. Open site