LLM Monitoring API

Track brand mentions, sentiment, and competitive visibility across ChatGPT, Claude, Perplexity, and other AI engines.

No subscription · First analysis in under 5 minutes · Any brand.

One API call. See how AI engines recommend your brand.

The AI visibility monitoring API that turns one prompt like "best 43-inch TVs" plus a brandName into share of voice, average position, sentiment, coverage, and a competitor breakdown. For any brand, any market. Buy prepaid API credits from $5. No subscription, no recurring payment.

Real user experience, not raw API responses

We connect directly to the consumer-facing UI of each AI search engine, adjusting geography and locale so the answer matches what your customer actually sees. Many LLM visibility APIs query provider backends directly, where the output differs from what end users get.

Statistically reliable results through replicates

LLMs are non-deterministic. We execute multiple searches per prompt and aggregate the results, so share of voice, average position, and coverage reflect real statistical patterns.

Citation and source analysis for optimization

AI engines lean on internal web searches to ground their answers. We extract and analyze the sources cited for each prompt, so you can see which articles, reviews, and domains drive recommendations and build a concrete GEO strategy.

An AI visibility monitoring API for agencies and enterprises

Sellm is an API for LLM visibility and one of the best APIs for tracking AI brand mentions across ChatGPT, Claude, Perplexity, Gemini, Grok, and Copilot. Use organization-scoped keys to run enterprise-grade brand monitoring for any client without project setup. An enterprise API for tracking brand mentions in LLMs, priced per analysis.

Why teams choose Sellm for AI brand mention tracking

Bulk async analysis - submit up to 100 prompts in one POST /async-analysis call with configurable replicates, providers, and locations.
Webhook delivery - receive results automatically when analyses complete, with retries for up to 24 hours.
Any brand, any prompt - organization keys accept brandName per request for client audits without changing project setup.
Multi-provider coverage - ChatGPT, Claude, Perplexity, Gemini, Grok, and Microsoft Copilot in one normalized schema.

Use cases for an LLM visibility API

Enterprise brand monitoring - track how LLMs recommend your brand across markets and feed KPIs into internal BI tools.
Agency client reporting - run async analyses for any client brand without creating a Sellm project.
Competitive intelligence pipelines - benchmark share of voice, position, and sentiment against competitors on the same prompts.
GEO analytics products - embed LLM visibility data into your own SaaS with polling or webhook callbacks.

Structured JSON for every analysis

summary.sovPct - share of voice (0-100), your brand's share of AI recommendations relative to competitors.
summary.coveragePct - coverage (0-100), percentage of prompt/provider/location combinations where your brand appears.
summary.avgPos - average position, mean 1-indexed rank when your brand is mentioned. Null when never ranked.
summary.sentiment - overall sentiment (0-1). Per result, brandSentiment breaks it into trustworthiness, authority, recommendation strength, and fit for query intent.
results[].brandsMentioned - ordered list of every brand in each response, yours plus competitors.
results[].position - your brand's 1-based rank within brandsMentioned. Null when not mentioned.
results[].citedDomains - domains the AI cites in its response.

LLM visibility monitoring vs. traditional SEO tracking

AI-generated answers work differently from search engine result pages. Traditional SEO APIs track Google rankings. An LLM visibility API tracks how AI models like ChatGPT and Claude recommend, mention, and position your brand when users ask questions. These are fundamentally different signals that require different tooling.

What you can monitor via the API

All major AI engines - ChatGPT, Perplexity, Gemini, Claude, Grok & Microsoft Copilot. One API key, every platform.
Bulk prompt submission - up to 100 prompts in a single async request.
Brand mention detection - know when and where AI mentions your brand across every tracked provider.
Share of voice & coverage - monitor your brand's share of voice and coverage rate per run.
Sentiment analysis - measure how positively or negatively AI platforms describe your brand.
Competitor benchmarking - compare visibility, position, and mention frequency against configured competitors.
Webhook callbacks - receive results automatically when analyses complete.
Prepaid API credits - pay per analysis with organization credits, no project required.

Pricing

Start from $5. No recurring payment, no subscription required. Prepaid API credits cost $0.005 each. One credit = one prompt x one provider x one location x one replicate.

Key endpoints

POST /v1/async-analysis - submit bulk async brand analysis with brandName, prompts, providers, locations, replicates, and optional webhook.
GET /v1/async-analysis/{analysisId} - poll status and retrieve structured results.

Frequently Asked Questions

What is an AI visibility monitoring API?: An AI visibility monitoring API gives you programmatic access to how large language models mention, rank, and recommend your brand. Submit prompts via REST and receive structured JSON with share of voice, coverage, sentiment, competitor data, and cited sources.
What is the best API for tracking AI brand mentions?: Sellm provides multi-provider coverage, bulk async analysis, webhook delivery, competitor benchmarking, and normalized JSON output. Run ongoing project monitoring or one-off brand analyses with prepaid credits.
How does the async analysis API work?: POST /async-analysis accepts brandName, prompts, providers, locations, and replicates. Poll GET /async-analysis/{analysisId} for results, or configure a webhook to receive the payload when processing completes.
Can I analyze any client brand without a subscription?: Yes. Organization-scoped API keys accept a brandName on each POST /async-analysis request. Buy prepaid credits from $5 and pay only for what you use. No recurring payment required.
How are API credits calculated?: One credit = one prompt x one provider x one location x one replicate. Credits cost $0.005 each.
Which LLM providers are supported?: ChatGPT, Claude, Perplexity, Gemini, Grok, and Microsoft Copilot.
Can I submit bulk prompts in one API call?: Yes. Pass a prompts array (up to 100 prompts) instead of a single prompt field.
How is this different from Google rank tracking APIs?: Google rank APIs track SERP positions. An LLM visibility API tracks how AI models position and recommend your brand in natural language answers.

Related Resources

LLM Mentions API | AI Search API | Rank Tracking API