# www.agentseo.dev — search and data APIs — 3 of 5

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> Probe-verified (tier 2 of 3). Last checked 2026-09-26. 3 of 5 capability checks passed. 2 unknown.

- host: www.agentseo.dev
- url: https://www.agentseo.dev/
- category: search and data APIs
- type: saas
- language: en

## Probe-verified · tier 2 of 3

Probed live on 2026-09-26 against rubric v1.2. 3 of 5 checks passed. 2 unknown.

- UNKNOWN — Markdown negotiation (`Accept: text/markdown`)
- UNKNOWN — Markdown twin at a predictable URL (`/page.md`)
- PASS — llms.txt (`/llms.txt`)
- PASS — API catalog (`RFC 9727`)
- PASS — MCP server card answers (`/.well-known/mcp/server-card.json → tools/list`)

MCP tools (from tools/list on 2026-09-26): agentseo_search, agentseo_extract, agentseo_analyze_serp, agentseo_local_audit, agentseo_content_gap, agentseo_opportunities_find, agentseo_opportunities_brief, agentseo_content_refresh_brief, agentseo_content_serp_outline, agentseo_content_brief, agentseo_content_draft_qa, agentseo_content_schema_plan, agentseo_content_internal_links, agentseo_content_title_meta, agentseo_content_keyword_map, agentseo_content_technical_qa, agentseo_content_action_plan, agentseo_site_sitemap_audit, agentseo_serp_volatility, agentseo_page_cro_qa, agentseo_ai_visibility_prompt_set, agentseo_content_programmatic_template, agentseo_content_cannibalization, agentseo_content_competitor_gap_matrix, agentseo_keyword_ideas_suggest, agentseo_keyword_metrics_overview, agentseo_domain_ranked_keywords, agentseo_domain_relevant_pages, agentseo_domain_competitors, agentseo_domain_intersection, agentseo_domain_traffic_estimate, agentseo_backlinks_summary, agentseo_backlinks_list, agentseo_backlinks_anchors, agentseo_backlinks_referring_domains, agentseo_backlinks_domain_pages, agentseo_backlinks_competitors, agentseo_backlinks_new_lost_timeseries, agentseo_backlinks_page_intersection, agentseo_backlinks_opportunity_finder, agentseo_page_intersection, agentseo_ai_overview_extract, agentseo_local_visibility_track, agentseo_rank_track, agentseo_job_status

## Summary

AgentSEO provides an SEO API for AI agents and developers, offering compact SERP evidence for rank tracking, content gaps, local visibility, and AI search workflows via REST or MCP.

## Context

105 sites in this index share the category "search and data APIs"; 20 are transactional.

## How we grade

- tier 1 — **Declared**: The site says agents are welcome in its robots.txt. A permission, not a capability.
- tier 2 — **Probe-verified** (this site): We fetched the site and tested each signal ourselves. Dated, repeatable, re-checked on a schedule.
- tier 3 — **Behaviourally verified**: An agent completed the action end to end — booked, bought, submitted — and it worked.

## About this record

Known Good probes sites live and publishes what was tested and when.
Method: https://knowngood.sh/about.md · Rubric: https://knowngood.sh/benchmark

How we found this site: probe discovery. This site didn't declare agent access — we found it by checking the open web. Everything above was tested the same way, against the same rubric, on the date shown. [How we choose what to check, and how to opt out](https://knowngood.sh/bot)

## Where this sits

- saas: https://knowngood.sh/type/saas
- search and data APIs: https://knowngood.sh/category/search-data-apis
- Browse: https://knowngood.sh/browse
- Rubric: https://knowngood.sh/benchmark