yangmao.ai · Free API intent page

HFViewer Free API Guide

HFViewer does not have a confirmed free API in our tracker yet, with $0 and rate limit notes of N/A.

Open official provider → Get one OpenAI-compatible key → Compare API gateway options →

Quick verdict

Free API: Not confirmed in the current snapshot
Rate limits: N/A
Best model starting point: Hugging Face Model Visualizer
Mainland China access: direct or relatively friendly

Provider fit matrix

Best fit Fast provider evaluation, prototypes, and fallback routing

Watch out Free credits and rate limits can change without warning

Production fallback Keep at least one compatible backup provider before shipping

Production readiness checklist

Quota gate No confirmed free API quota is recorded; verify HFViewer docs before collecting keys.

No-card check Try the free path first, then confirm whether billing is required for API keys, higher RPM, or production endpoints.

Regional smoke test Still run one request from your deployment region and from mainland China if users are there.

Source freshness Snapshot date: 2026-06-16; official quota and pricing can change without notice.

Python setup snapshot

Start with the smallest possible chat completion, then move the key to your server-side secret manager before production.

# HFViewer 是网页工具，不提供公开 API

# 使用方式：
# 1. 打开 https://hfviewer.com
# 2. 输入模型地址，例如：https://huggingface.co/Qwen/Qwen3.6-27B
# 3. 点击 Visualize Model 查看交互式结构图

cURL smoke test

Use this to verify endpoint, auth header, model name, response shape, and quota before adding SDK abstractions.

curl https://api.provider.example/v1/chat/completions \
  -H "Authorization: Bearer $HFVIEWER_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "Hugging Face Model Visualizer",
    "messages": [{"role": "user", "content": "Hello from yangmao.ai"}]
  }'

Free API and pricing notes

No public API or API pricing found; the core product is a free web visualizer

Access and production risk

Mainland China friendly / direct path likely

The site is directly accessible; model metadata depends on Hugging Face and may require a proxy in some regions.

Decision checklist

Check HFViewer free credits and rate limits.

Compare same-category providers and Mainland China access needs.

Pick the provider with the clearest no-card/free API path for testing.

HFViewer production validation table

Use this table before sending real users, scheduled agents, or paid traffic to HFViewer. The goal is to validate source freshness, quota behavior, regional access, and fallback needs instead of trusting a stale free-credit claim.

Check Pass condition If it fails

Signup and billing state Dashboard confirms whether API keys require billing or manual approval. Compare HFViewer alternatives or route through a gateway before inviting users.

First request from target region A minimal request succeeds from your deployment region and mainland-China test point if relevant. Do not ship cron jobs or public demos until latency, DNS, TLS, and auth are repeatable.

Quota, retry, and error shape Rate-limit behavior matches the current N/A note or official dashboard values. Cap retries, add request logging, and keep a second route for 429/5xx bursts.

Cost per accepted task Real prompts stay within your target token, query, image-credit, or compute budget. Use cheaper primary routes, caching, shorter prompts, or fallback only after validation failure.

额度变动提醒

想知道免费额度、价格或可用性变化？先订阅提醒，后续也可以对比官方平台、API 网关和同类替代方案。

订阅提醒 → 获取 OpenLLMAPI Key → 比较 API 网关 →

Source snapshot

Data source: yangmao.ai provider YAML tracker plus provider docs reviewed by the daily crawler. Official dashboards can change quota and pricing without notice; verify before production.

yangmao.ai provider id: hfviewer
Official source: https://hfviewer.com
Last updated: 2026-06-16
Free tier: Free web access
API credits: $0
Rate limit: N/A
Access note: The site is directly accessible; model metadata depends on Hugging Face and may require a proxy in some regions.

FAQ

Does HFViewer have a free API?

No confirmed free API is recorded in the current yangmao.ai snapshot; use the official docs as source of truth before signing up.

Is HFViewer OpenAI-compatible?

This snapshot uses a provider-specific OpenAI SDK example. If your app requires one stable OpenAI-compatible endpoint, use an aggregator or relay after checking HFViewer docs.

Can I use HFViewer from mainland China?

HFViewer is marked as relatively direct or Mainland-China-friendly in the current tracker.

What should I do when HFViewer credits run out?

Compare the alternatives below, check /en/free-ai-api/, and shortlist official providers or API gateway options before production.