New · AI field detection now generally available

E-signatures with an API that actually feels modern.

SpitShake is the API-first document signing platform for developers embedding signatures, automating contracts, and shipping compliance-first pipelines in minutes — not quarters.

Start free View the docs

HIPAA-ready SOC 2 controls AES-256 at rest SHA-256 chain audit

terminal · send-contract.sh 
# Send a contract for signing
curl https://spitshake.io/api/submissions \
  -H "X-Auth-Token: $SPITSHAKE_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "template_id": 42,
    "submitters": [{
      "role": "Signer",
      "email": "ada@acme.com",
      "name": "Ada Lovelace"
    }]
  }'

# → 201 Created. Email sent. Webhook fires on completion.
✓ submission_id: sub_7f3a
HIPAA-ready with BAA SOC 2 controls AES-256 at rest Open source Self-hostable

Why SpitShake

Legacy e-sign was built for procurement. We built it for engineers.

Legacy platforms

Clunky iframe embeds

Wrestle with z-index, sandbox attrs, and layout shift.

Legacy platforms

Per-seat pricing + surprises

Overage bills, "envelopes," and sales calls to raise limits.

Legacy platforms

Webhooks as an afterthought

Limited events, flaky retries, no signed payloads.

SpitShake

Web components + JWT iframes

Drop in React, Vue, Angular, RN. No layout gymnastics.

SpitShake

Flat per-submission pricing

Predictable, usage-based. No "talk to sales" to get started.

SpitShake

14 webhook events, signed

Form, field, submission, template lifecycle. HMAC-signed, retried.

The platform

Everything you'd build. Already built.

Templates, multi-party signing, audit trails, identity verification, payments — the primitives a modern signing workflow needs.

Embed in minutes

Web components for React, Vue, Angular, React Native. JWT-signed iframes for everything else. Ship a signing flow this afternoon.

<spitshake-form
  token="eyJhbGciOiJIUzI1..."
  theme="light"
/>

AI field detection

Upload any PDF. SpitShake auto-detects signature, date, and text fields and places them at pixel-perfect coordinates.

Multi-party & witness

Ordered or parallel signing. Witness sign-off. Delegation between signers.

Compliance-first

HIPAA BAA, SOC 2 controls, AES-256 encryption, immutable SHA-256 chain audit, TSA timestamps.

Identity verification

SMS OTP, KBA quizzes, email 2FA. High-assurance signing when you need it.

Integrations

Zapier, n8n, MCP server, 14 webhook events. Wire it to your stack in minutes.

Developer-first

First submission in under 5 minutes.

REST API with cursor pagination, HMAC-signed webhooks, and official SDKs for TypeScript, Python, and React.

curl https://spitshake.io/api/submissions \
  -H "X-Auth-Token: $SPITSHAKE_KEY" \
  -d '{
    "template_id": 42,
    "submitters": [
      { "role": "Signer", "email": "ada@acme.com" }
    ]
  }'
import { SpitShake } from '@spitshake/api';

const client = new SpitShake({ apiKey: process.env.SPITSHAKE_KEY });

const submission = await client.submissions.create({
  template_id: 42,
  submitters: [{ role: 'Signer', email: 'ada@acme.com' }]
});
import requests

requests.post(
    "https://spitshake.io/api/submissions",
    headers={"X-Auth-Token": os.environ["SPITSHAKE_KEY"]},
    json={
        "template_id": 42,
        "submitters": [{"role": "Signer", "email": "ada@acme.com"}]
    }
)
import { SpitShakeForm } from '@spitshake/react';

export function SignContract({ token }) {
  return <SpitShakeForm token={token} onComplete={handleDone} />;
}

SDKs & integrations

Meet your stack where it lives.

TS TypeScript
Py Python
React React
Vue Vue
NG Angular
RN React Native
CLI CLI
Zap Zapier
n8n n8n
MCP MCP
Hook Webhooks
API OpenAPI

Pricing

Flat per-submission. No sales calls.

Pay for submissions, not seats. Start free, scale with usage, annual plans save 20%.

Starter

Indie SaaS + agencies

$39/ month

200 submissions · $0.50 overage

  • Full REST API + every SDK
  • AI field detection
  • Remove SpitShake branding
  • Zapier, n8n, webhooks
Start Starter
Most popular

Growth

Growing SaaS + teams

$149/ month

1,000 submissions · $0.30 overage

  • Everything in Starter +
  • KBA + SMS verification
  • Signer delegation + witness
  • Priority Slack support
Start Growth trial

Business

Scaling teams w/ SSO

$399/ month

5,000 submissions · $0.20 overage

  • Everything in Growth +
  • SSO (SAML) + SCIM
  • 99.95% uptime SLA
  • Dedicated account manager
Start Business trial

Free tier (25 submissions/mo), pay-as-you-go ($0.75/submission), and Enterprise available. See full pricing + compare plans →

Security & compliance

Audit-ready from day one.

HIPAA-ready with BAA support, SOC 2 controls, AES-256 at rest, immutable SHA-256 chain audit trails, TSA timestamping, organization-wide MFA enforcement, and IP allowlisting.

Read the security docs

HIPAA

Ready + BAA

SOC 2

Controls

AES-256

At rest

SHA-256

Chain audit

MFA

Enforced

TSA

Timestamps

Ship your signing flow
this afternoon.

Create a template, embed the form, fire a webhook. The first submission takes five minutes.

Start free Talk to sales