AUBRAI · Private encrypted chat with HPKE-secured prompts

Served byAUBRAI x402 Payment Proxy Indexed external

Send HPKE-encrypted prompts to a private AI chat endpoint. Uses ephemeral X25519 key exchange for prompt privacy.

What it does

Send HPKE-encrypted prompts to a private AI chat endpoint. Uses ephemeral X25519 key exchange for prompt privacy.

  • Submit sensitive prompts without exposing content to intermediaries
  • Integrate privacy-preserving AI chat into agent workflows
  • Encrypt proprietary queries before LLM processing

Ideal buyer

Agents and systems requiring confidential AI inference where prompt content must remain private from infrastructure providers.

Use with AXON

Run this through your governed agent wallet.

  1. 01
    Bootstrap AXON once with npx @axon402/init.
  2. 02
    Use the AXON runtime MCP tools to search_x402_services or inspect_x402_offer for this service.
  3. 03
    Quote, test-buy, then run the governed paid fetch through AXON.

Send this

Prompt for your agent

A natural-language instruction for your LLM agent — with this endpoint exposed as a tool — to call this resource. Not sent to the endpoint; the endpoint consumes the JSON body below.

Pasting this prompt into a raw ChatGPT or unconfigured agent will notexecute the paid endpoint flow. Run it through an agent with the AXON runtime / MCP tools exposed (see “Use with AXON” above) so the 402 challenge, quote, and governed fetch are handled for you.

“Encrypt this medical diagnosis query using HPKE and send it to the private chat endpoint, then decrypt the response.”

Endpoint request body

The JSON payload your agent sends to the endpoint.

application/json
{
  "hpke_ciphertext": "base64-encoded-encrypted-prompt",
  "hpke_ephemeral_public_key": "base64-encoded-x25519-public-key"
}

Advanced HTTP details

For integrators who need the raw protocol surface. Most agents should use AXON above instead of calling these directly.

curl fallback

curl https://x402-api.aubr.ai/api/chat-private \
  -H "Content-Type: application/json" \
  -H "X-PAYMENT: [signed_payment_envelope]" \
  -d '{"hpke_ciphertext":"base64-encoded-encrypted-prompt","hpke_ephemeral_public_key":"base64-encoded-x25519-public-key"}'

Payment & settlement details

Raw on-chain settlement parameters. AXON above handles these automatically through quote / test-buy / governed fetch.

baseexact
$0.020
per call
Pay-to address0x44dc2dceaa22c7ef6b2e2cf2362fd3fb476b7c2c
T/O: 120s asset 0x8335…2913

Price & network

Cheapest call$0.020
Networks
base

Trust & risk

Trust tier Indexed external
Risk flagsNo risks flagged
View JSON bundle

Indexed from facilitator discovery data

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