Payment interoperability infrastructure

Make programmable payments finance-ready.

ProofRails turns stablecoin and paid API activity into structured payment records, portable evidence and integration-ready outputs—so every new rail does not create a new operational silo.

Discuss a payment flow Explore the engine

Hosted receipt API Flare mainnet USD₮0 Public verification Open-source engine

LIVE TRANSLATION VIEW

Engine ready

Stablecoin paymentchain · asset · settlement

402

Paid API callterms · resource · delivery

↗

Onchain eventparties · amount · reference

PROOFRAILS ENGINE Canonical payment record Normalize · link context · preserve evidence

ReceiptHuman-readable record

EvidenceSigned portable bundle

ArtifactsISO 20022-style files

VerificationHash and commitment check

ONE OPERATING RECORD

Value can move onchain in seconds. Finance operations still need to know what happened, why it happened and what record remains.

01 / THE GAP

Settlement moved value.
Your operations still need the record.

A transaction hash confirms movement. It does not, by itself, connect the payment to a commercial reference, the delivered service, finance-readable artifacts or a portable evidence trail.

WITHOUT A TRANSLATION LAYERFragmented

Rail-specific events, missing business context and manual reconstruction.

WITH PROOFRAILSStructured

Payment recordPR-2026-1842Recorded

Settlement: 0x8a91…e221
Reference: order-1842
Asset: 12.50 USD₮0
Evidence: bundle_hash

receipt.jsoncamt.054.xmlevidence.zip

One normalized record with linked context, outputs and verification.

02 / THE ENGINE

One record.
Multiple operational views.

ProofRails preserves payment and business context once, then produces the records different teams and systems need.

CAPTURE

Start from a real settlement reference.

Submit the chain, transaction hash, parties, amount, asset and the business reference your operations need to preserve.

Onchain transaction reference
Payment and counterparty context
Optional delivered-resource hash

chainflare

tip_tx_hash0x8a91…e221

amount12.50

currencyUSD₮0

referenceorder-1842

Receipt API

Turn an existing onchain settlement into a structured, shareable payment record.

Create a receipt ↗

Evidence engine

Package the record, manifest, file hashes, signature and public key into a portable bundle.

Inspect the engine ↗

Financial artifacts

Map payment data into finance-readable, ISO 20022-style payment and reporting files.

View artifacts ↗

Public verification

Recompute bundle integrity and compare it with the committed hash—without API credentials.

Verify a record ↗

03 / WHERE IT FITS

Built for the operational gap between new rails and existing systems.

STABLECOIN OPERATIONS

Give every payment the context finance needs.

Capture the settlement, parties, amount, asset and commercial reference in one portable record—ready to feed reconciliation and reporting workflows.

PAID APIS & AGENTS

Keep the business record after HTTP 402.

x402 can coordinate a payment for an HTTP resource. ProofRails records the settlement, links delivery evidence and preserves what remains after the request succeeds.

PRODUCT & FINANCE TEAMS

Add a finance-readable evidence layer without replacing your stack.

Use the hosted service or run the engine yourself. Connect receipt, artifact and verification outputs to the systems your teams already operate.

ONE RAIL, ALREADY IN MOTION

x402 handles the payment exchange.
ProofRails keeps the business record.

The current hosted ProofRails path uses real USD₮0 on Flare mainnet. After a paid request completes, the evidence engine can record the settlement, returned resource and linked evidence.

Read the integration guide ↗Compatibility and limitations →

CLIENTRequest resourceGET /premium/report

402Payment required

PAYMENTAuthorize USD₮0Flare mainnet

200Retry + delivery

RECORDPreserve evidenceReceipt · hash · bundle

04 / BUILD WITH IT

One API call creates the record that survives the payment.

Submit an onchain settlement with the context your application already knows. ProofRails returns a receipt identifier and linked evidence outputs.

Use the hosted API ↗Run the engine yourself ↗

CLIENT PATHSREST APITypeScript SDKPython SDKAgent docs

RECEIPT API

// Record an existing onchain payment
const receipt = await fetch(
  "https://app.proofrails.com/v1/iso/record-tip",
  {
    method: "POST",
    headers: {
      "X-API-Key": process.env.PROOFRAILS_KEY,
      "Content-Type": "application/json"
    },
    body: JSON.stringify({
      chain: "flare",
      tip_tx_hash: "0x…",
      amount: "12.50",
      currency: "USD₮0",
      reference: "order-1842"
    })
  }
);

201 CREATED{ "receipt_id": "pr_…", "bundle_hash": "0x…" }

05 / DESIGN PRINCIPLES

Open where it should be.
Verifiable where it matters.

⌁

Rail-neutral record

Preserve the business meaning of a payment without forcing every downstream system to understand its originating chain.

{ }

Engine or hosted service

Use the operated API and public verifier, or run the open-source engine with your own storage, keys and contracts.

Evidence that travels

Keep the receipt, manifest, file hashes, signature and public key together in a portable evidence package.

◇

Precise trust claims

Anchoring commits a hash for integrity and timing. It does not turn unknown offchain inputs into truth.

PROOFRAILS

New payment rails should not require new operational silos.

ProofRails is building the interoperability and operations layer that helps programmable payments fit the financial systems around them.

We are starting with a concrete foundation: structured onchain payment records, delivery evidence, finance-readable artifacts and public verification.

Meet the team ↓

06 / THE TEAM

A lean team working across payment rails, software and operations.

ProofRails brings together technical communication, infrastructure engineering and operating experience to make programmable payments usable beyond the transaction itself.

Victor Muñoz

CEO & Co-Founder

PhD in Physics, blockchain developer advocate, and educator. Victor brings a research-driven approach to building scalable decentralized systems, with extensive experience growing developer communities through technical education.

At ProofRails, he leads vision and strategy, focused on ISO-ready auditability and payment infrastructure for crypto-native businesses and enterprises adopting crypto rails.

X ↗LinkedIn ↗

Alfredo Mensi

CTO & Co-Founder

With a strong engineering background and over five years of experience in software development and entrepreneurship, Alfredo brings a unique perspective shaped by his work on open distributed ledgers for space applications, where he has explored cutting-edge integrations of AI, blockchain, zero-knowledge proofs, and IoT.

At ProofRails, he leads the technical vision and architecture, focused on ISO-ready auditability, secure integrations, and future-proof payment infrastructure for crypto-native businesses and enterprises adopting crypto rails.

X ↗LinkedIn ↗

Linnéa Sánchez

Operations Lead

MSc in Psychology and experienced project manager with over five years in team leadership and fundraising, securing more than $1M from multiple institutions for non-profits.

At ProofRails, Linnéa coordinates teams and works with multiple stakeholders to ensure alignment and operational excellence, delivering consistent, high-quality results across projects and partnerships.

X ↗LinkedIn ↗

Marek Z

Advisor

Currently a Senior Solutions Architect at BNP Paribas, Marek is a highly experienced software engineer with over a decade of expertise spanning IT and business development. He combines deep technical knowledge across web development, cybersecurity, blockchain, IoT, and performance optimization with strong strategic oversight and cross-team leadership.

As an advisor to ProofRails, he provides guidance on system architecture and DLT integrations within the banking and payments domain, helping align technical solutions with business objectives and the ISO 20022 standards landscape.

LinkedIn ↗

WORK WITH US

Future proof your career with ProofRails.

We are a lean, but highly effective team, contributing to advance the integration of traditional financial messaging with blockchain rails and crypto payments. We are open to new talent across product, operations, research, business development and marketing.

Apply to work with us ↗

BRING ONE PAYMENT FLOW

Make the next rail work with the systems you already have.

Show us the payment event, the business record you need and where that record must go.

Contact ProofRails Read the documentation

Make programmable payments finance-ready.

Settlement moved value.Your operations still need the record.

One record.Multiple operational views.

Start from a real settlement reference.

Receipt API

Evidence engine

Financial artifacts

Public verification

Built for the operational gap between new rails and existing systems.

Give every payment the context finance needs.

Keep the business record after HTTP 402.

Add a finance-readable evidence layer without replacing your stack.

x402 handles the payment exchange.ProofRails keeps the business record.

One API call creates the record that survives the payment.

Open where it should be.Verifiable where it matters.

Rail-neutral record

Engine or hosted service

Evidence that travels

Precise trust claims

New payment rails should not require new operational silos.

A lean team working across payment rails, software and operations.

Victor Muñoz

Alfredo Mensi

Linnéa Sánchez

Marek Z

Future proof your career with ProofRails.

Make the next rail work with the systems you already have.

Settlement moved value.
Your operations still need the record.

One record.
Multiple operational views.

x402 handles the payment exchange.
ProofRails keeps the business record.

Open where it should be.
Verifiable where it matters.