One API key for 200+ models: the Yomi API integration guide

Introduction

Developer Lin held separate Claude, GPT, DeepSeek and Kimi keys. Every switch meant finding a different key and endpoint; monthly reconciliation required four dashboards. Once, a subscription expired and a silent production failure took two hours to diagnose.

He consolidated access with Yomi API: one key for 200+ models and 30+ providers, with calls and billing in one place. This guide takes you from registration to a first response in under ten minutes.

Key takeaways

• One key accesses 200+ models from 30+ providers without separate accounts.
• OpenAI-compatible base_url:https://api.yomiapi.com/v1, usable directly with SDKs and curl.
• Switch by changing model. Popular IDs include claude-sonnet-5, gpt-5.5, deepseek-v4-pro, subject to the current model listing.
• Intelligent failover and low-latency global nodes.
• RMB top-ups through WeChat Pay/Alipay, separate input/output token billing and itemized records.

Yomi API: one endpoint for every model family

Yomi API is an OpenAI-compatible gateway combining 200+ GPT, Claude, Gemini, DeepSeek and other models. Your code needs three values:api_key, base_url, model. With these, call any available model without separate provider accounts.

Official subscriptions require separate accounts, keys and billing per provider. Multiple models mean multiple credentials.Yomi unifies calls and billing under one key; switching models changes one field.

• OpenAI compatibility: change base_url; SDKs, curl and clients are supported.
• Intelligent routing: requests are distributed across upstreams and automatically fail over without manual intervention.
• Token metering: separate input/output rates and itemized records.
• Transmission security: TLS 1.3 encryption and no content storage.

For each request, routing selects an upstream according to model availability and route quality. Failed nodes trigger backup routing without caller intervention, adding resilience for the application.

Three steps from registration to your first call

Step 1: Register at Yomi API with email; no overseas payment method is required.

Step 2: Create an API key in the console's Keys page. Use one per project with independent permissions and quotas; replace an exposed key without affecting others.

Step 3: Replace the endpoint with this OpenAI-compatible base_url:

https://api.yomiapi.com/v1

Set model to an ID such as claude-sonnet-5 or gpt-5.5 from the current listing. With all three values ready, copy and run the example.

Start with a short test message such as "Hello" to distinguish configuration issues from application issues before using real workloads.

Complete examples: Python and curl

Use the official openai Python SDK with the new base_url. This example calls claude-sonnet-5:

from openai import OpenAI

client = OpenAI(
    api_key="sk-YOUR-YOMI-API-KEY",        # Key created in the console
    base_url="https://api.yomiapi.com/v1" # Yomi OpenAI-compatible endpoint
)

resp = client.chat.completions.create(
    model="claude-sonnet-5",              # Use model names from the current Model Explorer listing
    messages=[{"role": "user", "content": "Hello, introduce yourself in one sentence"}]
)
print(resp.choices[0].message.content)

The same workflow works in curl. This example calls gpt-5.5:

curl https://api.yomiapi.com/v1/chat/completions \
  -H "Content-Type: application/json" \
  -H "Authorization: Bearer sk-YOUR-YOMI-API-KEY" \
  -d '{
    "model": "gpt-5.5",
    "messages": [{"role": "user", "content": "Hello, introduce yourself in one sentence"}]
  }'

Note:model names must match the current Model Explorer listing, Yomi Model Explorer lists all available models. Change only model to switch; the rest of the code stays intact.

Popular model quick reference

Choose by task. For everyday Q&A and coding, try claude-sonnet-5; for complex reasoning, use claude-opus-4-8 or similar flagships. For large volumes of Chinese text, try glm-5.2 and kimi-k3. If unsure, ask several models the same question and compare the answers.

These are popular examples; use the full listing in Model Explorer as the reference. The same key and base_url can call all of them.

Frequently asked questions

Token billing with separate input and output rates

After topping up, charges follow usage and appear individually in the console. Start small, check latency and stability, then scale. For details, see this top-up and billing guide.

Disable and replace an exposed key independently

Disable it in the console without affecting other keys or projects. This is why project isolation limits the impact of exposure.

Difference from official subscriptions

Official subscriptions use separate accounts, keys and billing for each provider. Yomi combines them under one key, with model switching by one field, official model channels, TLS 1.3 and no content storage.

RMB top-ups through WeChat Pay / Alipay

Top up in the console without overseas payment methods and start once funds arrive. Small additional top-ups are available; a large initial balance is unnecessary.

Final thoughts

Lin now changes one field to switch models and reconciles one dashboard at month end. Your steps are equally simple: register → create a key → change base_url → switch model.

After the first call, spend a few yuan testing two or three common models. Use measured latency and answer quality to choose the main model before adding more credit. Low switching costs make experimentation easy.

Create your first key in the console →