# retellai.com: agentic web grade B

Score 38 (coverage 20 + breadth 3 + conformance 15); 3 standards observed across 2 of 9 steps; checked 2026-10-25T13:34:19Z via www.retellai.com. This grades the agent-facing files published at retellai.com, not the organisation's products.

## Manifests

| Manifest | Path | Result | Errors | Warnings |
| --- | --- | --- | --- | --- |
| Agentic Resource Discovery | /.well-known/ard.json | absent HTTP 404 |  |  |
| AI Catalog well-known file | /.well-known/ai-catalog.json | absent HTTP 404 |  |  |
| MCP Server Cards (SEP-2127) | /mcp/server-card | absent HTTP 404 |  |  |
| Agent2Agent Protocol | /.well-known/agent-card.json | absent HTTP 404 |  |  |
| llms.txt | /llms.txt | valid |  |  |
| AGENTS.md | /AGENTS.md | absent HTTP 404 |  |  |
| Agent Skills | /.well-known/agent-skills/index.json | absent HTTP 404 |  |  |
| api-catalog: A Well-Known URI and Link Relation to Help Discovery of APIs | /.well-known/api-catalog | absent HTTP 404 |  |  |
| AI Crawler User-Agent Tokens in robots.txt | /robots.txt | valid |  | no Agentmap: line (optional convention pointing agents at /.well-known/ard.json) |
| security.txt (RFC 9116) | /.well-known/security.txt | absent HTTP 404 |  |  |
| auth.md | /auth.md | absent HTTP 404 |  |  |
| Open Knowledge Format | /okf/index.md | absent HTTP 404 |  |  |

## Standards observed

- llms.txt: https://retellai.com/llms.txt (https://agenticweb.wiki/protocols/llms-txt/)
- Content Signals Policy: https://retellai.com/robots.txt (https://agenticweb.wiki/protocols/cloudflare-content-signals-policy/)
- AI Crawler User-Agent Tokens in robots.txt: https://retellai.com/robots.txt (https://agenticweb.wiki/protocols/ai-crawler-tokens-robots/)

## Cheapest next steps

1. Agentic Resource Discovery: a catalog at /.well-known/ard.json lets agents discover your APIs, MCP servers and data in one fetch (https://agenticweb.wiki/protocols/ard/)
2. AGENTS.md: instructions for coding agents working on or with the site (https://agenticweb.wiki/protocols/agents-md/)
3. api-catalog: A Well-Known URI and Link Relation to Help Discovery of APIs: an RFC 9727 linkset pointing at your OpenAPI description (https://agenticweb.wiki/protocols/api-catalog-rfc9727/)

Published a manifest or spotted a path we missed? Submit at https://agenticweb.wiki/submit/ or email mailto:info@belgravialabs.com?subject=Manifest%20or%20correction%20for%20retellai.com.

## Agent pre-flight & practical readiness

Preferred mode: `llms_txt`. GET /llms.txt and follow the links it names. That index is the page list an agent should read. Split-brain llms.txt: retellai.com/llms.txt has 22 links while docs.retellai.com/llms.txt has 304 technical links. Probe docs.retellai.com for full developer documentation.

Fetch: `GET https://retellai.com/llms.txt` GET /llms.txt and follow its links.

Subdomain discovery hint (`split_brain_llms_txt`): Split-brain llms.txt: retellai.com/llms.txt has 22 links while docs.retellai.com/llms.txt has 304 technical links. Probe docs.retellai.com for full developer documentation. (https://agenticweb.wiki/check/docs.retellai.com/)

Practical readability: exa_parsable yes, markdown negotiation no, render `ssr_rich`, HTML quality `high`, first content at byte 124760 (~122 KB of head/script markup before main text), HTML-to-llms.txt token ratio 81.001×, JSON-LD Organization, Brand, WebSite, SoftwareApplication, Product, AggregateOffer, UnitPriceSpecification, QuantitativeValue, PostalAddress, FAQPage, Question, Answer.

AI crawler posture: `open_to_all` · Assistant access: OpenAI `allowed`, Anthropic `allowed`, Google `allowed`, Perplexity `allowed`, Exa `allowed`.

Readiness subscores: reach 20/20, readability 22/30, capabilities 4/35, conformance 15/15, total 61/100, grade B.

## Rubric

+10 per lifecycle step with a standard observed, counting manifests that validate or that the probe rule for the standard recognises (a valid MCP server card counts for MCP; max 90); +3 per observed standard beyond the first two (max 15); conformance +15 (+10 with one manifest) minus 5 per agent-facing manifest with errors, never below 0 (security.txt is reported, not scored). Lifecycle grade: A+ >= 60, A >= 45, B >= 30, C >= 20, D >= 10. Strict 100-point composite (subscores.total_100 / subscores.grade_100): reach_and_policy (20) + readability (30) + capabilities (35) + conformance (15), where A+ >= 80, A >= 65, B >= 45, C >= 28, D >= 15.

JSON: https://agenticweb.wiki/check/retellai.com/index.json · badge: https://agenticweb.wiki/badge/retellai.com.svg