Seal — Contract Infrastructure
Seal is the contract API — upload, send, sign, audit. Built for your code, designed for your agents. And signing is free, because paying for a primitive is over.
npm install @vortex-api/sealimport { createSealClient } from "@vortex-api/seal";
const seal = createSealClient({ apiKey: process.env.SEAL_API_KEY });
const { url } = await seal.request("POST", "/uploads/generate-url", {
filename: "mutual-nda.pdf",
});
// …upload the PDF to url…
const { id } = await seal.request("POST", "/documents", {
title: "Mutual NDA",
source: { uploadedUrl: url },
});
await seal.request("POST", `/recipients?document_id=${id}`, {
email: "jane@acme.com",
role: "signer",
});
await seal.request("POST", `/documents/send?id=${id}`);The contract API
( 01 / 04 )Documents, recipients, signatures, audit — the full lifecycle of a contract as REST calls, generated from a single OpenAPI spec into typed SDKs.
The thesis
( 02 / 04 )seal/sēl/n.a device stamped in wax to authenticate a document — the original signing primitive
A signature is a primitive, not a product. Incumbents charge per seat per month for a bit of ink — then charge again when your team grows.
Seal gives signing away. What you pay for is the platform around it: the API surface, the audit trail, the agent that prepares and chases the contract for you.
Contracts are where deals happen. This is where they get done.
Pricing
( 03 / 04 )The incumbents charge per person per month whether or not anyone signs anything. We charge for the platform you actually use.
For building, prototyping, and side projects.
For production deal flow at any volume.
For volume, compliance, and procurement realities.
Agent-first
( 04 / 04 )Seal ships a real MCP server, not a marketing claim. Agents can draft documents, add recipients, send for signature, and read the audit trail — with scoped API keys you control.
Works with Claude Code, Cursor, Codex — any MCP client. Your agent already speaks Seal.
The alternative
We read their pricing pages so you don't have to.
One API key to a signed contract in minutes.
Get an API keyFree tier · No credit card · docs.seal.nyc