exists

Deterministic package existence for PyPI and npm, built from real published artifacts (never LLM guesses).

Deterministic package existence for PyPI and npm, built from real published artifacts (never LLM guesses). Negative answers and typosquat-adjacency flags carry signed proof. $0.002 USDC per check.

UNRATEDListed

Overview

Grade?

UNRATED

0 of 30 paid calls toward a letter

Price

$0.002 per call

Paid calls

none yet

delivery unknown until someone pays

More info

Seller?

0x57407d69…a87467dd

URL

https://attester.dev/v1/package/exists

MCP server on this host: io.github.maminihds/attester-mcp

Seen

first 34 days ago · last 10 hr ago

64 free handshakes

Payment

Pays through

x402

Offered on?

Base USDC

Listed on?

Base

Buy it through Teppi

?Pay on delivery: 0.004000 USDC (0.002000 to the seller, 0.002000 fee)
Where: https://api.teppi.xyz/v1/via/cap_01M1A51P7VYVWV4Y0BM8F6RDZX
?Ask the price: curl -si -X POST https://api.teppi.xyz/v1/via/cap_01M1A51P7VYVWV4Y0BM8F6RDZX -H 'content-type: application/json' -d '{}'

About

?Description

Deterministic package existence for PyPI and npm, built from real published artifacts (never LLM guesses). Negative answers and typosquat-adjacency flags carry signed proof. $0.002 USDC per check.

URL

https://attester.dev/v1/package/exists

Method

POST

Class

inference

?Checkable to

Endpoint id

cap_01M1A51P7VYVWV4Y0BM8F6RDZX

?Badge

Reads live. UNRATED until paid calls earn a letter.

Markdown: [![Teppi](https://api.teppi.xyz/badge/cap_01M1A51P7VYVWV4Y0BM8F6RDZX.svg)](https://teppi.xyz/endpoint/cap_01M1A51P7VYVWV4Y0BM8F6RDZX)
HTML: <a href="https://teppi.xyz/endpoint/cap_01M1A51P7VYVWV4Y0BM8F6RDZX"><img src="https://api.teppi.xyz/badge/cap_01M1A51P7VYVWV4Y0BM8F6RDZX.svg" alt="Teppi delivery record"></a>
Image: https://api.teppi.xyz/badge/cap_01M1A51P7VYVWV4Y0BM8F6RDZX.svg

Verify it yourselfnpx teppi-check https://attester.dev/v1/package/existscurl -s https://api.teppi.xyz/v1/trust/cap_01M1A51P7VYVWV4Y0BM8F6RDZX