Pay-per-call APIs and MCP services for agents, no accounts or keys, with verifiable receipts.
Agents buy infrastructure the way they call tools: send the request, pay the 402 challenge within a hard USD cap you set, read the result and its settlement proof. The catalog, prices, and schemas are immutable and public at ausca.com/catalog.json; the full agent contract is ausca.com/SKILL.md.
| Service | What it does | Price (USD) |
|---|---|---|
| Document OCR | Normalized text with line confidence from one committed document | $0.25 per document |
| Document Analysis | Normalized forms, tables, signatures, or layout from one committed document | $0.30 to $0.75, sized by document bytes |
| Media Transcription | Normalized transcript of one committed audio or video file | $0.40 to $1.30, sized by media bytes |
| Browser Session | Remote browser with standard CDP access | $0.05 / 10 min, $0.10 / 30 min, $0.20 / 60 min |
| Agent Inbox | A renewable receive-only email address your agent owns | $0.05 / hour, $0.20 / day, $1.00 / week |
| Inbox Extension | Add time to an active inbox without changing its address | $0.05 / hour, $0.20 / day, $1.00 / week |
Prices are the public catalog values at the time of writing; the live catalog is authoritative.
MCP (Claude Desktop, Cursor, any MCP host): the local server holds your wallet and pays within your cap. Tools are derived from the live catalog.
{
"mcpServers": {
"ausca": {
"command": "npx",
"args": ["-y", "ausca", "mcp"],
"env": {
"AUSCA_PRIVATE_KEY": "0x...",
"AUSCA_MAX_PAYMENT_USD": "0.50"
}
}
}
}
TypeScript
import { AuscaClient } from "ausca";
const client = AuscaClient.withLocalKey({
privateKey: process.env.AUSCA_PRIVATE_KEY, // pays USDC on Base
maxPaymentUsd: 0.5, // hard per-call cap
});
const outcome = await client.invoke("browser.session", { duration_seconds: 600 });
console.log(outcome.result, outcome.payment?.transaction);
CLI
npx ausca catalog
npx ausca price document.ocr
AUSCA_PRIVATE_KEY=0x... AUSCA_MAX_PAYMENT_USD=0.50 \
npx ausca invoke browser.session '{"duration_seconds":600}'
Python
pip install ausca
from ausca import AuscaClient
client = AuscaClient.with_local_key(private_key=key, max_payment_usd=0.50)
outcome = client.invoke("browser.session", {"duration_seconds": 600})
A remote MCP server also runs at https://ausca.com/mcp (Streamable HTTP)
for discovery, preparation, and state reads; payment always signs on your
side, which is why the local server exists.
Every service is an x402 v2 payable
resource. An unsigned request returns the exact payment requirement; the
client pays it only if it fits your cap, then retries the same bytes with
the same idempotency key, so an uncertain retry can never buy twice.
Settlement is USDC on Base and every completed invocation carries a receipt
with a public, hash-only verification page. Payment rails are pluggable
behind one interface; the official @x402/* libraries do all signing.
Document and media services take an immutable artifact commitment instead
of raw bytes: npx ausca commit file.pdf uploads through the keyless
ingress and returns the commitment the offer input carries.
| Package | Registry | What it is |
|---|---|---|
ausca | npm | The front door: library, CLI, and local MCP server |
@ausca/sdk | npm | The typed engine: client, payment authorities, artifact store |
ausca | PyPI | Python client and CLI with the same ports |
@ausca/ai-sdk | npm | Vercel AI SDK tools for any x402 v2 resource |
langchain-ausca | npm | LangChain tools for any x402 v2 resource |
skills/ | ausca.com | Agent skills, mirrored from the live origin |
The service runtime is not in this repository; this is the complete public
buyer side. server.json carries the official MCP registry identity
com.ausca/agent-services.
MIT
Source-derived launch command. Check the maintainer’s required arguments and credentials before running:
npx -y auscaMerge this template into ~/Library/Application Support/Claude/claude_desktop_config.json. Keep existing servers. Add any arguments, credentials, and permissions required by the maintainer; this template has not been install-tested.
{
"mcpServers": {
"com-ausca-agent-services": {
"command": "npx",
"args": [
"-y",
"ausca"
]
}
}
}Restart Claude Desktop completely for changes to take effect. Confirm the server appears connected in the client’s tool list, then try a read-only example from its documentation.
Claude Desktop setup referenceauscanpmAusca works with any MCP-compatible client. Copy the config snippet from the Configuration section above and add it to the file shown for your client, then restart the application.
~/Library/Application Support/Claude/claude_desktop_config.jsonRestart Claude Desktop completely for changes to take effect.~/.cursor/mcp.jsonRestart Cursor for changes to take effect..vscode/mcp.jsonReload VS Code window for changes to take effect.~/.codeium/windsurf/mcp_config.jsonRestart Windsurf for changes to take effect..mcp.jsonSave at the project root, then start Claude Code in that project and review the MCP server approval prompt. Keep real credentials out of shared files.