⚡ Now live — Python & Node.js SDKs

The Coding AI API
Built for developers.

Fix, review, test, and explain code via API. With memory of your stack, style, and patterns — so you never repeat context.

Start for free — 100 calls/day
View docs →
100Free calls
per day
₹199/moUnlimited
Pro plan
~18msAvg latency
(cached)
🐍 main.py
Fixed in 1 iteration
Status:"fixed"
Tokens:234
Cost:$0.000019
Tier:nascentist-fast
Trusted by developers at*
GitHub
Vercel
Supabase
Railway
Render
Replit
Linear
Notion
Figma
PostHog
GitHub
Vercel
Supabase
Railway
Render
Replit
Linear
Notion
Figma
PostHog

* Used by developers building on these platforms. We do not claim formal enterprise partnerships.

Try it before you sign up

Choose any endpoint. See exactly what you get back.

input.py
from nascentist import Nascentist

client = Nascentist(api_key="nsc_live_...")
result = client.agent.fix(
    code="""
def get_user(users, id):
    for i in range(len(users)):
        if users[i].id = id:    # BUG: assignment not comparison
            return users[i]
""",
    language="python",
    error="SyntaxError: invalid syntax"
)
response.json
{
  "status": "fixed",
  "fixed_code": "def get_user(users, id):\n    for i in range(len(users)):\n        if users[i].id == id:  # Fixed: == not =\n            return users[i]",
  "iterations": 1,
  "changes": [
    {
      "iteration": 1,
      "error_found": "Assignment operator = used instead of == in comparison",
      "fix_applied": "Replaced = with == on line 3"
    }
  ],
  "usage": {
    "prompt_tokens": 187,
    "completion_tokens": 89,
    "cost_usd": 0.0000075,
    "tier_used": "nascentist-fast",
    "cache_hit": false
  }
}

Install the SDK

Everything you need to ship better code

agent.fix()

An iterative agent loop that debugs your code. Pass the error message and broken code — get back working code, with a full explanation of what changed and why. Works in 40+ languages.

result = client.agent.fix(code=..., language="python")
Avg 1.3 iterations to fix

agent.review()

A code review that gives you a score out of 100, with categorized issues: security vulnerabilities, performance bottlenecks, style violations. Focus on specific areas or get a full review.

result = client.agent.review(code=..., focus=["security"])
Security • Performance • Style

agent.test()

Auto-generate unit tests with target coverage. Specify pytest, jest, vitest, or mocha. Edge cases included by default. Every test is explained.

result = client.agent.test(code=..., framework="pytest")
pytest • jest • vitest • mocha

agent.explain()

Get a structured breakdown of any code — beginner to expert level. Identifies patterns, anti-patterns, key concepts, and potential issues. Ideal for onboarding or learning.

result = client.agent.explain(code=..., level="beginner")
beginner • intermediate • expert
Persistent Memory

Set your stack once.
It remembers forever.

Most AI APIs forget everything between calls. You re-explain your stack, language, and style every single time. That's wasted tokens and wasted money.

Nascentist remembers. Store your tech stack, coding conventions, and project context once. Every future request automatically has full context.

stack
convention
context
preference
See the Memory API →
Setup (one time)
client.memory.setup(
tech_stack="Python 3.11, FastAPI, PostgreSQL 15",
conventions="snake_case, type hints, 90-char lines",
project_context="B2B invoice automation SaaS"
)
# ✓ Stored 3 memories (47 tokens)
Every future request ↓
Next request (no setup needed)
result = client.agent.fix(
code=broken_code,
language="python"
# Memory auto-injected:
# "Stack: Python 3.11, FastAPI, PostgreSQL 15"
# "Style: snake_case, type hints"
# "Project: B2B invoice SaaS"
)
47 memory tokens added automatically

Avg memory injection: 47 tokens = $0.000003 per request

From zero to working in 5 minutes

Step 1

Sign up for free

Create an account. Get an API key immediately. 100 calls per day on the free plan. No credit card needed.

Secret Key
nsc_live_abc123def456...
Copy
Step 2

Install in 10 seconds

Official SDKs for Python and Node.js. Zero runtime dependencies. Type-safe responses. Works with any framework.

$ pip install nascentist
✓ nascentist 1.0.0 installed
Step 3

First result in seconds

Call any endpoint. Get structured JSON back. The model routes automatically based on query complexity.

result = client.agent.fix(
code=broken_code,
"python"
)
print(result.status)# "fixed"

Official SDKs

pip install nascentistnpm install nascentist
quick.py
from nascentist import Nascentist

client = Nascentist(api_key="nsc_live_xxx")
# or: set NASCENTIST_API_KEY env var

result = client.agent.fix(
    code="def add(a, b): return a - b",
    language="python"
)
print(result.fixed_code)    # def add(a, b): return a + b
print(result.usage.cost_usd)  # ~0.000008

Simple pricing for Indian developers

Free

₹0/month
  • ✓100 API calls per day
  • ✓All 4 endpoints (fix, review, test, explain)
  • ✓10 stored memories
  • ✓nascentist-fast model
  • ✓Python + Node.js SDK
  • ✓REST API access
  • ✗No priority routing
  • ✗No unlimited calls
  • ✗No email support
Start for free →

No credit card required

Most Popular

Pro

₹199/month
vs ₹840/mo for GitHub Copilot
  • ✓Unlimited API calls/day
  • ✓All 4 endpoints (fix, review, test, explain)
  • ✓Unlimited memory entries
  • ✓All 4 models (fast → max)
  • ✓Priority routing (2× faster)
  • ✓Python + Node.js SDK
  • ✓REST API access
  • ✓Email + Discord support
  • ✓Early access to new models
  • ✓Usage dashboard + analytics

₹199/month · Cancel anytime · No contracts
Billed monthly via Razorpay

Need more? Enterprise plans available.

Write to enterprise@nascentist.ai

How Nascentist compares

FeatureNascentist FreeNascentist Pro
GitHub CopilotOpenAI APIPlain Groq
Monthly price₹0₹199₹840Pay-as-goPay-as-go
API access✓✓✗✓✓
Bug fixing (agentic)✓✓✗ManualManual
Code review✓✓✗ManualManual
Test generation✓✓LimitedManualManual
Persistent memory10 entriesUnlimited✗✗✗
Cost per 1K callsFree (100/day)~₹0.08—~₹2.50~₹0.80
Python/Node.js SDK✓✓✗✓✓
India pricing₹0₹199/mo₹840/moUSD onlyUSD only

Prices as of March 2026. OpenAI cost estimate based on GPT-4o-mini at $0.15/1M input tokens. Copilot price is IDE plugin only.

Frequently asked questions

Yes. 100 API calls per day, forever. No trial period. No credit card required. The 100/day limit resets at midnight IST. The only limit is calls per day — no feature restrictions.
All major languages: Python, JavaScript, TypeScript, Go, Rust, Java, C++, C#, Ruby, PHP, Swift, Kotlin, and more. Just pass the language name as a string.
Nascentist adds a structured agent layer: the iterative fix loop, the review scoring system, the test generator, and the explain formatter. It also handles model routing automatically — simple queries use cheap models, complex ones use powerful models. And memory is built in.
Cached responses return in <20ms. Uncached simple queries take 300-800ms. Complex reasoning queries take 2-5 seconds. The Shadow Router adds <10ms overhead.
Your code is processed in-memory and returned. We do not store your code on our servers beyond the request lifetime. Memory entries (which you explicitly create) are stored in your isolated namespace. We do not use your data for training.
Yes. The API is production-ready with rate limiting, error handling, and structured JSON responses. The Pro plan has unlimited calls and priority routing.
Razorpay processes payments in ₹ INR. No USD conversion. No international transaction fees. Cancel anytime from your dashboard.
Pro users get email + Discord support. Free users have access to the docs and can submit support tickets from the dashboard.
Ready to build?

Start fixing bugs in 3 lines of code.

Free plan. No credit card.
Your API key is ready in 60 seconds.

Read the docs
pip install nascentist·npm install nascentist