Sponge GTM brain

Sponge provides agent wallets and a merchant gateway so AI agents can spend money and businesses can sell to them.

category

Agent payments infrastructure

market profile

  • text: Autonomous agents purchasing APIs and services need payment methods that do not depend on a human completing each checkout.
  • text: Agent payment infrastructure spans wallets, card payments, crypto and merchant acceptance, with several competing providers.

personas

  • title: AI agent product engineer
    pains:
    • Agent workflows stall at paid services requiring human checkout
    • Agent spend needs transaction limits and permitted destinations
  • title: API platform founder or product lead
    pains:
    • Automated buyers need to discover, onboard and pay for services
    • Building support for agent payment protocols can consume engineering time
  • title: Fintech or platform engineering lead
    pains:
    • Integrating accounts, cards and crypto into agent workflows involves multiple rails
    • Needs clear controls and an understanding of separate card and wallet terms

icp

  • text: Developer-led AI agent companies building workflows that purchase premium data, browser access or other paid services.
  • text: API and digital service providers seeking machine-to-machine payment acceptance through x402 or MPP.

message pillars

  • text: Give agents an account to hold and spend funds.
  • text: Help businesses accept purchases directly from agents.
  • text: Reduce integration work for service providers.
  • text: Fit into developers' existing agent tooling.

objections

  • objection: How do we prevent agents overspending?
    response: Test the advertised daily, transaction and destination controls in a bounded pilot and confirm enforcement.
  • objection: Will merchants have to rebuild their API?
    response: The gateway claims no code changes; validate onboarding and the supported protocol against the buyer's real API.
  • objection: Are all funds and payment methods the same product?
    response: Review the card issuer's terms separately from the crypto wallet and virtual accounts, which the site describes as separate features.

competitors

  • name: Crossmint
    why: Provides agent wallets and cards for developer-led agent payments.
  • name: Coinbase
    why: Agentic Wallets and x402 support compete for agent wallet and API payments.
  • name: Skyfire
    why: Combines agent identity and payments with a wallet offering.

influencers

  • name: Eric Zhang
    url: https://www.linkedin.com/in/ericzhang98
    why: Co-founder posts product updates on card payments and agent integrations.

keywords

  • AI agent payments
  • agent wallet API
  • x402 payment gateway
  • machine to machine payments
  • AI agent spending controls
  • agent payment infrastructure

voice

  • Developer oriented
  • Direct and practical
  • Uses concrete transaction examples

signals

  • text: An agent product needs to purchase premium data or API access during autonomous execution.
  • text: An API provider is adding x402 or MPP acceptance to serve agent customers.

stack

  • TypeScript SDK
  • MCP
  • x402
  • MPP
  • Visa

pricing

model: unknown

motion

product_led

channels

  • Developer documentation
  • Self-service wallet and gateway
  • LinkedIn

confidence

medium

Founders

  • name: Eric Zhang
    title: Founder
    role: Founder
    bio: Co-founder Sponge (YC W26). Ex-Stripe Crypto.
  • name: Jae Choi
    title: Founder
    role: Founder
    bio: Co-founder Sponge (YC W26). Ex-Stripe Crypto.
  • name: Rishab Luthra
    title: Founder
    role: Founder
    bio: Co-founder Sponge (YC W26). Ex-Stripe Crypto.

Back to YC companies