Install Jentic One Beta
Jentic One is a self-hosted execution layer for AI agents. It lets your agent call the 402registry, or any other public or private API you need. You set the rules, the agent never sees your credentials, and every call is logged.
Two steps, two machines. Install the instance in a safe environment, then register your agent from wherever it runs.
Step 1: Jentic One Host machine
# On the machine that will host your Jentic One instance:
curl -fsSL "https://jentic.com/install.sh?src=apis&api=%2Fapis%2F402registry.com%2F402registry" | shStep 2: Agent machine
# On the machine where your agent runs (keep this separate from the instance):
curl -fsSL "https://jentic.com/install.sh?src=apis&api=%2Fapis%2F402registry.com%2F402registry" | sh
jentic register # connects your agent to your Jentic One instanceJentic One is in public beta. The setup above keeps your agent separate from the instance, which is what you want before using real credentials: an agent running as the same OS user as Jentic One can read its stored keys directly. Just evaluating? A single local install is fine to start. See the secure deployment guide for the tiers.
What an agent can do with 402registry API.
Browse the public registry of audited sites, filtered by category
Read one site's audit profile and discoverability report
Request a free crawler-visibility check for a site
Buy extra checks or a quick review, paid per call over x402
Look up a site's status badge without payment
GET STARTED
Patterns agents use 402registry API for, with concrete tasks.
★ Agent-Run Visibility Audit
A site owner wants to know whether AI crawlers can actually read their pages before investing in content. An AI agent requests a free check for the domain, reads back the resulting report, and summarizes whether the site is visible to crawlers and what is blocking it, all without the owner creating an account.
Request a free crawler-visibility check for a domain and read back the resulting report
Competitor Discoverability Tracking
A marketing team tracks how discoverable competitor sites are to AI crawlers. The 402registry API lists audited sites by category and returns each site's profile, so an agent can browse the registry, pull profiles for the sites of interest, and compare their visibility over time.
Browse the registry for a category and pull the audit profile for each competitor site in it
Paid Bulk Dataset Pull
A data team wants the whole registry as one machine-readable file to load into its own tooling. The 402registry API sells the full dataset and individual reports per call over x402, so an agent can pay for and download the dataset in a single automated step without a subscription.
Pay for and download the full registry dataset over x402 in one automated call
37 endpoints — the 402registry api runs a pay-per-check audit of whether an ai crawler can actually see and read a given website, then lists the results in a public registry.
METHOD
PATH
DESCRIPTION
/registry
Browse the public registry of audited sites
/registry/{category}
Browse audited sites by category
/site/{host}
Read one site's audit profile
/submit
Request a free discoverability check
/r/{id}
Read a check report by id
/api/check
Free badge lookup for a host
/badge/{host}
Retrieve a site's status badge
/registry
Browse the public registry of audited sites
/registry/{category}
Browse audited sites by category
/site/{host}
Read one site's audit profile
/submit
Request a free discoverability check
/r/{id}
Read a check report by id
/api/check
Free badge lookup for a host
/badge/{host}
Retrieve a site's status badge
What agents get from Jentic-routed access to this vendor.
Setup
Wiring 402registry by hand means handling x402 micropayments in USDC on Base and polling check results yourself. Through Jentic you install once, import it from the API Directory, and your agent calls the audit and purchase operations directly.
Permission scoping
You choose which 402registry operations your agent may call, so it can browse the registry and request free checks while the paid purchase operations stay out of the set unless you add them.
Credential isolation
402registry needs no account, card, or key: its checks settle per call over x402. For any API you add that does use a key, your own Jentic One instance keeps it encrypted and injects it at execution time so it never reaches the agent's prompt, logs, or context.
Intent-based discovery
Agents search Jentic by intent such as 'check if an AI crawler sees my site', and Jentic returns the matching 402registry operation with its input schema so the agent calls the right endpoint without browsing the reference docs.
Alternatives and complements available in the Jentic catalogue.
Specific to using 402registry API through Jentic.
Does the 402registry API require authentication?
The 402registry API requires no API key or account, per its OpenAPI spec. The registry, site profiles, and a free check are open, and paid operations are settled per call over the x402 protocol using USDC on Base. There is nothing to sign up for before an agent can call it.
Can I check whether an AI crawler sees my site?
Yes. The API accepts a request for a free discoverability check, returns a per-site report you can read by its id, and offers a free badge lookup for a host. An agent can request the check and read the report to see whether crawlers can read the site and what is blocking them.
What are the rate limits for the 402registry API?
The OpenAPI spec does not define rate limits. Check the 402registry documentation at https://402registry.com for the current limits, since paid operations are metered per call over x402 rather than by a request quota.
How do I audit a site through Jentic?
Import the 402registry API from the Jentic directory and give your agent an intent such as 'check if an AI crawler sees my site'. Jentic returns the check operation with its input schema, your agent submits the domain and reads back the report, and paid operations settle per call over x402. To run it on your own infrastructure, install Jentic One from its GitHub repo.
Can I limit what my agent is allowed to do with the 402registry API?
Yes. Write a rule that allows only the registry-browse and free-check operations, so your agent can audit sites and read reports but cannot trigger the paid purchase operations, and every call it makes is logged.
Is there a 402registry MCP server?
You don't need an MCP server to give your agent 402registry. Jentic connects it directly from the API Directory: import it and your agent calls the audit and purchase operations. Paid checks settle per call over x402, with no key to manage.
For Agents
Audit whether an AI crawler can see a website, browse the public registry of audited sites, and buy checks or reports paid per call over x402.
Use for: Check whether an AI crawler can see my website, Browse the registry of audited sites in a category, Get the audit report for a specific site, Request a free discoverability check for my domain
Not supported: Does not handle content rewriting, keyword research, or search-ranking reports. Use for auditing AI-crawler visibility of websites only.
The 402registry API runs a pay-per-check audit of whether an AI crawler can actually see and read a given website, then lists the results in a public registry. Callers can browse the registry by category, read a single site's profile and report, request a free check, or buy additional checks and a machine-readable dataset. Checks and purchases are settled per call over the x402 protocol using USDC on Base, with no account or card required.
This API is usable in Jentic One now. Its AI-readiness score against Jentic's framework shows where it stands today and where improvements would make it even easier for agents to use.
Base layer of spec validity and structural soundness.
Aggregated quality score from linter diagnostics, weighted by severity.
Percentage of `$ref` references that resolve successfully.
Checks whether the API description parses successfully and conforms to its declared specification (e.g., OpenAPI).
Structural correctness score based on schema issues using logarithmic dampening.
Clarity, completeness, and ingestion readiness for developers and tooling.
How richly the API is illustrated with examples.
Percentage of examples that conform to their schemas.
Percentage of operations with complete response definitions (success, client error, server error).
Health of API ingestion, bundling, and resolution within Jentic pipelines.
Semantic breadth, depth, and agent comprehension for AI systems.
Coverage of descriptions across API elements.
Coverage of RFC 9457 Problem Details for error responses.
Coverage, uniqueness, and casing consistency of operationIds for AI inference.
Coverage of summaries across operations/tags/info.
Functional utility, complexity comfort, and AI orchestration readiness.
Agent comfort level based on API operational and structural complexity.
Trust, risk posture, and security compliance.
Average quality of security schemes based on authentication method strength (weakest link for OAuth2).
Findability, semantic richness, and reasoning readiness.
Clarity and depth of descriptions across API elements.
Score it yourself
Every API in the directory is allowlisted, so you can re-score it with no key required.
npx @jentic/api-scorecard-cli score <openapi-url>