# SummerEyes > Formal uncertainty reasoning engine. Auditable verdicts from conflicting sources. SummerEyes is a reasoning engine built by Upside Down Research that analyzes claims from multiple sources to detect contradictions, assess confidence, evaluate timelines, and identify what evidence is missing. It uses formal mathematics — not vibes — to produce verdicts you can trace and audit. ## How to connect - MCP endpoint: POST https://api.summereyes.vip/mcp/v1 (JSON-RPC 2.0, Streamable HTTP) - REST API: POST https://api.summereyes.vip/api/v1/investigations/analyze - Interactive API docs: https://api.summereyes.vip/docs - OpenAPI spec: https://api.summereyes.vip/openapi.json - Auth: x-api-key header (get a key at https://summereyes.vip/dashboard/connection) ## What it does You submit an investigation: a research question, sources (actors), entities (subjects), claims, and evidence. The engine runs four formal reasoning systems: 1. Source Weighting — each source gets an effective credibility score from reliability, source type, topic competence, and conflicts of interest. 2. Temporal Decay — older claims lose weight. Decay rate depends on domain (finance: 180 days, science: 25 years), source authority, claim maturity, and epistemic status. Corroboration resets the clock. 3. Opinion Fusion — three-level evidence fusion: within-source deduplication, within-group citation chains, cross-group independent corroboration. Results are belief + disbelief + uncertainty = 1.0. 4. Conflict Resolution — formal argumentation finds every coherent interpretation of the evidence. Each gets a coherence score. Walk the interpretation tree to trace the reasoning. ## What you get back - subject_results: per-subject verdicts (belief/disbelief/uncertainty, expected_probability, truth status: True/False/Both/Neither) - ranked_claims: all claims sorted by net evidence strength (strong/moderate/contested/weak/refuted) - conflict_analysis: interpretation trees showing which claims survive challenges, who supports each reading, attack/support edges - claim_analyses: per-claim belief/disbelief/uncertainty, temporal_decay_factor, epistemic_status, freshness_score - sensitivity_analysis: evidence gaps ordered by potential impact, discriminating claims, suggestions for what to investigate next - temporal_analysis: stale claims, corroborated claims, supersession chains, overall freshness - warnings: input validation issues to address for better results ## Key concepts - Source types: Analyst, Journalist, Expert, Insider, Regulator, Institutional, Anonymous, SocialMedia, Troll - Claim types: Factual, Predictive, Evaluative, Causal, Procedural, Methodological - Valence: Supports (affirms predicate), Refutes (denies predicate), Neutral - Epistemic status: conjecture > hypothesis > theory > law (also: superseded, retracted) - Domains: Finance, News, Technology, Geopolitics, Medicine, Science, Legal, General - Scope: disambiguates same-predicate claims (e.g. "global" vs "US") — different scopes don't contradict - Numeric proximity: financial values within 5% are not treated as contradictions - Credibility floor: sources below ~0.15 effective reliability are acknowledged but zeroed in fusion - Summary mode: set summary_mode: true for compact output (top findings, contested claims, evidence gaps, synthesis paragraph) ## Full documentation For the complete schema, worked example, and detailed field reference: https://summereyes.vip/llms-full (HTML) https://summereyes.vip/llms-full.txt (plain text) ## Links - Website: https://summereyes.vip - Docs: https://summereyes.vip/docs - API reference: https://api.summereyes.vip/docs - Pricing: https://summereyes.vip/pricing - About: https://summereyes.vip/about