YC Summer 2026 (S26) founder

Karen Serfaty

Founder of Agentcard, cards for AI agents

Agentcardfintech59 public signals

Company

Karen Serfaty is listed as a founder of Agentcard. Agentcard.sh is a debit card for AI agents. Agents can use Agentcard’s API to issue cards and pay for things online autonomously.

Founder traction evidence

Public posts and activity attributed directly to this founder.

  1. X

    today we are excited to launch Agentcard (yc s26) agents can buy things for us, but in order to do so they need to be able to pay.

    today we are excited to launch Agentcard (yc s26) agents can buy things for us, but in order to do so they need to be able to pay. current solutions don't work: x402 and MPP are great, but no online store supports them. Agentcard is a simple vault that companies can use to

  2. X

    you can now get Doordash from iMessage. really. try it now for free :) text to get started: +1 (628) 309-4547

    you can now get Doordash from iMessage. really. try it now for free :) text to get started: +1 (628) 309-4547

  3. X

    yc: do things that don’t scale @agentcardhq : say no more *puts 1000 agentcard coupon codes in cars in marina* 0:01 / 0:12

    yc: do things that don’t scale @agentcardhq : say no more *puts 1000 agentcard coupon codes in cars in marina* 0:01 / 0:12

  4. X

    Agentcard launches token rewards for B2B purchases

    Agentcard launches token rewards for B2B purchases

  5. X

    finally someone’s doing this (we are doing this)

    finally someone’s doing this (we are doing this)

  6. X

    our version of the collison installation https://t.co/5IRA5AYBwl

    our version of the collison installation https://t.co/5IRA5AYBwl

  7. X

    good morning

    good morning

  8. X

    best advice we got from @paulg was probably just permission to double down on what we do instead of trying to solve some imaginary future problem

    best advice we got from @paulg was probably just permission to double down on what we do instead of trying to solve some imaginary future problem