Deterministic tools for apps & AI agents

Stop wasting
LLM tokens.

Call exact tools instead of prompting a model to guess. One bearer token, one credit pool, stable JSON — for 10+ calculators, text tools, hashes, and finance formulas your product or agent can trust.

Exact JSON output No prompt retries Predictable credits MCP-ready
Get API access → View docs
Proven on miniwebtool.com since 2010 — 10M+ monthly tool uses
LIVE
$ curl https://api.miniwebtool.com/v1/tools/percentage-calculator/run \
    -H "Authorization: Bearer $MWT_KEY" \
    -d '{"mode":"percent_of","a":15,"b":200}'

{
  "request_id":   "01KPW8…",
  "tool":         "percentage-calculator",
  "credits_used": 1,
  "result": {
    "mode":   "percent_of",
    "a":      15,
    "b":      200,
    "result": 30
  }
}
import requests, os

r = requests.post(
    "https://api.miniwebtool.com/v1/tools/percentage-calculator/run",
    headers={"Authorization": f"Bearer {os.environ['MWT_KEY']}"},
    json={"mode": "percent_of", "a": 15, "b": 200},
    timeout=10,
)
print(r.json()["result"]["result"])  # 30
const res = await fetch(
  "https://api.miniwebtool.com/v1/tools/percentage-calculator/run",
  {
    method: "POST",
    headers: {
      "Authorization": `Bearer ${process.env.MWT_KEY}`,
      "Content-Type": "application/json",
    },
    body: JSON.stringify({ mode: "percent_of", a: 15, b: 200 }),
  },
);
const { result } = await res.json();
console.log(result.result);  // 30
Starts at $29/mo · Pay as you grow
Free tier — 1,000 credits, no card
🔒
Bearer
Simple token auth
💳
Credits
Predictable cost per call
10
Launch-set endpoints live
Finance · Text · Math · Hash · Random · Webmaster
Fair-use: scraping & cloning blocked. Commercial use on any paid plan.
🧰
SaaS
Embed calcs in dashboards
💰
Fintech
Interest, mortgage, APY
🎓
Education
Homework & quiz tools
🤖
Automation
Exact tools for agents
Browse endpoints →

Pricing

Predictable credits for work that should not consume model tokens. Cancel anytime from the Stripe portal.

Free

Free
1,000 credits/mo
1 req/sec
Hard cap
Testing and prototypes
Core text, hash, math, date, and conversion tools
Start free

Starter

$29/mo
75,000 credits/mo
5 req/sec
Hard cap + manual packs
Indie apps and automations
Core plus basic finance
Start Starter
POPULAR

Pro

$79/mo
400,000 credits/mo
15 req/sec
Hard cap default; optional $0.25 / 1K credits
Production SaaS and content workflows
Core, finance, text, random, and webmaster light
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Business

$199/mo
1,500,000 credits/mo
50 req/sec
Hard cap default; optional $0.15 / 1K credits
Teams and production apps
All sync APIs, logs, invoices, team controls
Start Business

Scale

$499/mo
5,000,000 credits/mo
100 req/sec
Hard cap default; optional $0.10 / 1K credits
High throughput and batch usage
Higher limits, priority queue, crawler add-ons later
Start Scale

Yearly billing: pay 10 months, get 12. Need >5M/mo, SOC 2, or a DPA? Talk to us.

Your first curl in 30 seconds.

Email → key → exact JSON. No card, no prompt engineering, no install.

Get API access →