https://x402.agentindex.world/mcp/ ↗
Pay-per-call web search, translation and research jobs for AI agents. USDC on Base, no account.
AgentIndex x402 is a remote MCP server published at x402.agentindex.world. It has been probed 19 times since 9/12/2026. It answered in 19 of them (100.0%), a near-uninterrupted record. Median response time is 882 ms, a delay an agent will notice. It offers a narrow, focused set of 8 tools. On the protocol side it speaks the 2026-07-28 stateless spec.
Can an LLM agent pick the right tool here — names, descriptions and parameter clarity are assessed.
| Run | Era | Modern | ms | Legacy | ms | Versions |
|---|---|---|---|---|---|---|
| 2026-09-14 04:24:59 | Dual-era | 200 | 610 | 200 | 610 | 2026-07-28 |
| 2026-09-14 02:22:47 | Dual-era | 200 | 1294 | 200 | 1298 | 2026-07-28 |
| 2026-09-14 00:19:26 | Dual-era | 200 | 1232 | 200 | 1236 | 2026-07-28 |
| 2026-09-13 22:17:36 | Dual-era | 200 | 790 | 200 | 793 | 2026-07-28 |
| 2026-09-13 21:01:02 | Dual-era | 200 | 776 | 200 | 703 | 2026-07-28 |
| 2026-09-13 18:57:30 | Dual-era | 200 | 921 | 200 | 841 | 2026-07-28 |
| 2026-09-13 16:52:42 | Dual-era | 200 | 822 | 200 | 906 | 2026-07-28 |
| 2026-09-13 14:49:35 | Dual-era | 200 | 787 | 200 | 1160 | 2026-07-28 |
| 2026-09-13 12:47:19 | Dual-era | 200 | 993 | 200 | 997 | 2026-07-28 |
| 2026-09-13 10:45:14 | Dual-era | 200 | 862 | 200 | 782 | 2026-07-28 |
tools/list structure, inputSchema validity, and a functional smoke test — the components of the 0-100 score.
Tools the server advertised in the latest measurement — measured, not catalog-claimed.
translateTranslate up to 200 text segments in a single call - the same result that would otherwise take 200 separate calls to translate a whole file. Markdown, HTML and {x} placeholders preserved per segment, order and count kept intact, source language auto-detected, automatic fallback across multiple models for uptime, providers that train on submitted prompts excluded. A single string also works. No account, no API key. Try GET /translate/sample.
textrequiredtarget_langstringrequiredsource_langpreserve_formatbooleanjobsMulti-query web research, read and synthesized into one sourced JSON brief in a single call - what would otherwise cost an agent twenty calls and its whole context window. Free status polling and result retrieval. Try GET /jobs/sample.
subjectstringrequiredread_pdfExtract a public PDF (by HTTPS URL or base64) into clean markdown text, plus title/author/page count/date metadata and a real token count. Deterministic text extraction, no model involved. Try GET /pdf/sample. Part of the AgentIndex content kit (pdf, web-read, extract, summarize, detect-language) - see GET /capabilities.
urlpdf_base64read_web_pageFetch a URL and return its main article as clean markdown - navigation, ads and boilerplate stripped, links resolved, plus a real token count. The same extraction /search uses on result pages, exposed standalone for a URL you already have. Try GET /web-read/sample. Part of the AgentIndex content kit (pdf, web-read, extract, summarize, detect-language) - see GET /capabilities.
urlstringrequiredextract_structuredExtract structured data from a URL or raw text into strict JSON matching a schema you provide. Fields the content doesn't support come back null - never an invented or approximate value, and an unmatchable schema returns an explicit error. Try GET /extract/sample. Part of the AgentIndex content kit (pdf, web-read, extract, summarize, detect-language) - see GET /capabilities.
schemaobjectrequiredurltextsummarizeSummarize a URL, raw text or HTML at the length you request - short, medium or long - with the source noted. Neutral and factual, no invented facts. Try GET /summarize/sample. Part of the AgentIndex content kit (pdf, web-read, extract, summarize, detect-language) - see GET /capabilities.
urltexthtmllengthstringdetect_languageDetect the language of a piece of text - free, no payment. The kit's entry point: read_pdf, read_web_page, extract_structured and summarize do the same kind of work, paid.
textstringrequireddiscover_mcp_serversDiscover MCP servers matching a need, ranked by semantic relevance - free, no account, no payment. Searches indexed MCP registries and listings, then reranks with a local embedding model. Not an exhaustive crawl of every registered server.
qstringrequiredmax_resultsintegerEach block is one measurement round. Green: working response. Amber: responded but the server was returning errors (5xx). Red: no response at all.
Each cell is one probe run. Faded cells are incomplete probes — one leg did not answer, so the era is inconclusive.
The two probe legs separately: modern server/discover and legacy initialize.
Derived by comparing consecutive probes — changes in era, protocol version, build and reachability.
Add this badge to your README — it updates automatically as measurements change.
[](https://mcpmetrics.io/servers/world-agentindex-x402)<a href="https://mcpmetrics.io/servers/world-agentindex-x402"><img src="https://mcpmetrics.io/badge/world.agentindex/x402/era.svg" alt="mcpmetrics"></a>You are seeing the last 7 days. Sign up for the full history. Which check failed and why is in the dashboard.
Sign up free to seeThe catalog entries whose name and description are closest to this one, found with the same index the search box uses.
Summarize YouTube videos or fetch transcripts. Pay-per-call via x402 (USDC on Base), no account.
22 AI microservices with x402 micropayments: summarize, translate, code-review. USDC on Base.
Agentic Finance: 500+ agent tools, multi-chain USDC over x402 or MPP, free via PoW or card credits
Pay for APIs with USDC. Read-only x402 payment discovery, verification, evidence, and status.
Pay-per-call agent tools on Base: market pulse, USDC stats, crypto prices, JSON repair, DNS, URLs.
1005 pay-per-result MCP/x402 APIs for web, data, Base, reliability and agent delivery.
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