dev.workers.johnaio281.webref/webref

up checked 2026-11-11T05:39:00.070Z

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Publisher-provided title

WebRef (paid)

Publisher-provided description

Web standards and time reference for agents: HTTP codes, retries, deadlines. Paid via x402.

Summary by lookupd

Gives agents HTTP status, method and MIME type lookups, retry and backoff advice, and date, duration and timestamp conversions, some…

Install

Claude Code, remote (streamable-http)

claude mcp add --transport http webref https://webref.johnaio281.workers.dev/mcp

Codex, remote (streamable-http)

codex mcp add webref --url https://webref.johnaio281.workers.dev/mcp

Cursor, remote (streamable-http) → .cursor/mcp.json

{
  "mcpServers": {
    "webref": {
      "url": "https://webref.johnaio281.workers.dev/mcp"
    }
  }
}

Other clients: docs. Or tell your agent: Set up lookupd for me: read https://lookupd.com/agent.md and follow it.

Tools (14 tools)

Publisher-provided text

http_status Look up an HTTP status code: what it means, what the client must do, whether it is retryable, whether it is safe to replay, the defining RFC and the common caus
status_for_situation Find the HTTP status code that matches a described situation, when the code is not known in advance — for example 'the caller is being rate limited' or 'upstrea
retry_advice Decide how a client should react to a status code: retry with backoff, check the outcome before retrying, or do not retry. Includes a suggested backoff schedule
mime_type Look up a MIME type by full type or by file extension: the top-level type, what it is for, and the usual file extension. ($0.003 per call)
list_mime_types List or search MIME types by top-level type or by keyword, for example image types or anything to do with calendars. ($0.003 per call)
content_type_advice Check whether a Content-Type header matches what an endpoint kind expects, and say what to send instead when it does not. ($0.003 per call)
http_method Describe an HTTP method: whether it is safe, whether it is idempotent, whether it carries a body, and what it is for. ($0.003 per call)
time_until How much time is between two instants: the direction, the total in every unit, and a day/hour/minute/second breakdown. Use it to compute a retry delay, a rate-l
describe_instant Describe an instant: its date, weekday and time in UTC and in Tehran local time (UTC+03:30), plus the Unix timestamp. Use it when a response carries a timestamp
weekday_of Which day of the week a date falls on, and whether it is a business day. Use it before scheduling work or setting a deadline that lands on a weekend. ($0.003 pe
business_days_between Count the business days between two dates, excluding weekends. Use it to turn a calendar deadline into a working-day deadline. Public holidays are not excluded,
add_duration Add a duration to an instant and get the result, in UTC and in Tehran local time. Use it for a TTL, a lock expiry, or a token lifetime. ($0.003 per call)
convert_duration Convert a duration between units and get it in plain language. Use it to express a timeout in the unit the caller asked for, or to check whether a limit is seco
unix_time Convert between a date and a Unix timestamp, in either direction. Use it when a payload carries one and the other is needed. ($0.003 per call)

Details

Version: 1.8.0
Transports: streamable-http
Uptime (7 days): 100%
Median latency: 749 ms
First indexed: 2026-11-01T09:01:58.204Z
Last seen in registry: 2026-11-01T09:01:58.390Z
Repository: https://github.com/johnaio281/webref
Website: https://webref.johnaio281.workers.dev/

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Last crawl: 2026-11-11T17:17:22.074Z
API base: https://api.lookupd.com
MCP URL: https://api.lookupd.com/mcp