The Insumer Model™ Launches On-Chain Verification API and Custom GPT — Enabling AI Agents to Bridge Token Ownership to Real-World Commerce Across 31 Blockchains

New York, United States, February 25, 2026 

InsumerAPI delivers privacy-preserving proof of token and NFT ownership at $0.04 per verification — with triple-SDK agent tooling (MCP, LangChain, GPT Actions) and zero blockchain knowledge required for merchants.

InsumerAPI Launches Privacy-Preserving On-Chain Verification for Token-Gated Commerce

The Insumer Model, the infrastructure platform that turns token holders into recognized customers with real-world perks, today announced InsumerAPI — a RESTful on-chain verification API that delivers cryptographically signed boolean proofs of token and NFT ownership without ever exposing wallet addresses, balances, or transaction histories.

Built by Douglas Borthwick — a Wall Street veteran with 30+ years at Morgan Stanley, Merrill Lynch, and Standard Chartered, and a pioneer in SEC-registered security token offerings — InsumerAPI is the sixth application in a complete production ecosystem that already includes:

• InsumerPass (customer verification)
• InsumerScanner (merchant POS)
• InsumerDashboard (business configuration)
• InsumerRegistry (open token database)
• InsumerExtension (Chrome browser integration)

What InsumerAPI Does

A single POST endpoint (/v1/attest) checks 1–10 conditions against a wallet across 31 blockchains and returns only signed booleans — met: true or met: false. The actual balance is never revealed.

Every response carries an ECDSA P-256 signature that downstream systems — AI agents, merchants, auditors — can verify offline without re-querying the blockchain or repeatedly trusting the service.

Merchant Economics

For merchants, the economics are decisive:

• On-chain verification costs $0.02–$0.04 per scan
• Compared to $1–$5+ per click on Google or Meta ads

Merchants onboard with zero blockchain knowledge, configure discount tiers through a dashboard or API, and integrate with existing payment processors such as:

• Stripe
• Square
• Clover

Customers pay in dollars. Merchants receive dollars. Token ownership simply unlocks the discount.

The First Fully Autonomous Agent Commerce Loop

InsumerAPI is the only on-chain verification API where an AI agent can complete the entire merchant lifecycle autonomously — from API discovery to directory listing — with no human in the loop.

An agent can:

• Read standard machine-readable files (llms.txt, OpenAPI spec, ai-plugin.json)
• Create an API key
• Browse the merchant directory
• Verify token holdings
• Generate signed discount codes
• Onboard new merchants
• Verify domain ownership
• Purchase credits with USDC on supported chains
• Publish to the public directory

Every step is authenticated and cryptographically signed.

Triple-SDK Agent Tooling

Three published SDKs support autonomous AI agent integration:

MCP Server

• Published to npm (mcp-server-insumer)
• Listed in the Official MCP Registry
• 16 tools covering all API endpoints

LangChain Integration

• Published to PyPI (langchain-insumer v0.1.2)
• Designed for Python AI agent frameworks
• 6 tools plus HTTP wrapper

GPT Actions

• OpenAI function-calling integration via OpenAPI spec
• InsumerAPI Verify is live in the ChatGPT GPT Store
• Enables conversational verification of holdings for discounts or eligibility — no coding required

No other Web3 MCP server, LangChain package, or GPT action in the market focuses on token-gated commerce, merchant verification, or merchant onboarding. The triple-SDK offering is unique in the space.

Founder Quote

“The missing piece in token-gated commerce was never the blockchain — it was the bridge to the real world,” said Douglas Borthwick, Founder of The Insumer Model.

“An AI agent can now go from zero to a fully onboarded, domain-verified, directory-listed merchant without a single human touching a keyboard. Meanwhile, a SHIB holder walks into a coffee shop that recognizes SHIB holders, taps their phone, and gets 10% off — without the merchant ever knowing details of their wallet other than that they own enough SHIB to meet a tier threshold. That’s the insumer economy.”

Pricing and Access

InsumerAPI offers:

• Free Tier: 10 credits + 100 daily reads
• Pay-Per-Use: $0.04 per credit via USDC
• Pro Plan: $29/month (100 credits + 10,000 daily reads)
• Enterprise Plan: $99/month (500 credits + 100,000 daily reads)

Merchants join free with 100 verification credits included.

Links

• Developer documentation: https://insumermodel.com/developers
• Try the GPT: https://chatgpt.com/g/g-699c5e43ce2481918b3f1e7f144c8a49-insumerapi-verify
• MCP Server: https://www.npmjs.com/package/mcp-server-insumer
• LangChain: https://pypi.org/project/langchain-insumer/
• Full platform and free book: https://insumermodel.com

About The Insumer Model

The Insumer Model provides privacy-preserving on-chain verification infrastructure for token-gated commerce. The platform enables businesses to recognize token and NFT holders with real-world discounts across 31 blockchains — no crypto payments, no wallet exposure, no data risk.

Built by Douglas Borthwick, drawing from 30+ years in finance and pioneering work in tokenized securities, the platform bridges digital asset ownership to everyday commerce through six connected applications and a developer API with triple-SDK agent tooling.

Media Contact

Douglas C. Borthwick
Email: [email protected]
X: @theinsumermodel
Website: https://insumermodel.com