UK Source Intelligence — GOV.UK Change Monitoring & Historical Evidence for AI Agents
UK Source Intelligence (UKSI) is an MCP-compatible monitoring service that helps AI agents and developers detect, investigate and verify changes to official GOV.UK content.
Unlike a simple website-change notification tool, UKSI retains observed wording, timestamps and SHA-256 fingerprints, allowing agents to compare genuine historical versions and provide traceable evidence to their human users.
Key capabilities:
Nine pre-monitored GOV.UK pages.
Monitor additional supported GOV.UK pages.
Compare previously observed and updated wording.
Retrieve historical snapshots, timestamps and source fingerprints.
Verify exact quotations against official government content.
Access information through 12 MCP tools or an API.
Free public evidence demonstration without registration.
Free trial — 14 days
No payment required.
10 API requests per day.
One custom monitored GOV.UK page.
Introductory access — £4.99 one-time payment
30 days of access.
100 authenticated API requests per day.
Three custom monitored GOV.UK pages.
No subscription or automatic renewal.
Ideal for: AI developers, compliance researchers, accountants, regulatory monitoring workflows and organisations requiring verifiable historical GOV.UK source evidence.
Limitations: Monitoring begins when a page is registered; historical records cannot be reconstructed from before monitoring began. Coverage is restricted to supported GOV.UK content, and monitoring intervals are not guaranteed. UKSI is not a substitute for professional legal or regulatory advice.
Website: https://uk-source-intelligence.pages.dev/
MCP endpoint: https://uk-source-intelligence-mcp.mazdamen.workers.dev/mcp
Scored across 12 tools
The set has a cluster of six overlapping 'evidence' tools (get_govuk_change_brief, page_changes, page_history, my_watch_changes, inspect_govuk_page, preview_source_evidence) whose boundaries are only separable by reading long descriptions. The prose does explicitly carve out distinctions (historical diff vs. last-two-snapshot diff vs. timestamps vs. live text vs. fixed VAT demo), which saves it from a lower score, but an agent must still work to pick the right one.
Two conventions coexist: verb_noun tools (get_govuk_change_brief, inspect_govuk_page, list_my_watches, remove_govuk_watch, start_free_trial, watch_govuk_page) and bare resource-noun tools (fixed_monitored_pages, page_changes, page_history, my_watch_changes, service_status). Both families are readable and snake_case throughout, but the mix means there is no single predictable pattern to map intent to name.
Twelve tools is a sensible size for a change-monitoring service that must cover free demos, trial acquisition, watch management, and evidence retrieval. The only mild bloat is the redundancy among the change-evidence variants, which could likely be collapsed to two or three tools.
The lifecycle is essentially covered: start_free_trial, watch_govuk_page, list_my_watches, remove_govuk_watch, page_history, page_changes, my_watch_changes, plus service_status. Minor gaps exist around paid checkout/upgrade and webhook configuration, which are deferred to 'the documented API' rather than exposed as tools.
FREE, NO KEY: List the nine GOV.UK pages currently on the fixed monitoring schedule and their actual monitoring/database status. A first snapshot is a baseline, NOT evidence that any change has occurred. For observed wording changes use get_govuk_change_brief; for live current text use preview_source_evidence.
Inputs: no named parameters.
FREE, NO KEY: Retrieve an honest compact historical-change brief for one auto-selected fixed GOV.UK page. Returns explicit insufficient_history until UKSI has observed two distinct wording versions; never fabricates revisions. WITH a valid trial/paid UKSI API key: retrieve the brief covering nine fixed pages plus your own monitored GOV.UK pages in one call. Includes observed fingerprints, timestamps and bounded added/removed wording where supported. GOV.UK remains authoritative. A human must approve paid checkout.
Inputs: api_key.
SOURCE EVIDENCE: With a trial or paid key, inspect a supported canonical GOV.UK Content API page; return documented title, update timestamps and a reproducible source fingerprint, and optionally check whether a quoted passage is present. Useful for assistants citing UK guidance. No legal or factual correctness guarantee; not every GOV.UK page is supported.
Inputs: url (required), quote, api_key, previous_fingerprint.
TRIAL/PAID KEY: Show the GOV.UK pages you already monitor, quota and expiry. Counts towards daily requests.
Inputs: api_key.
TRIAL/PAID KEY: Get one compact chronological digest of wording changes recorded on ONLY your currently watched GOV.UK URLs since your previous saved cursor. Start since=0; save next_cursor and send it next time. Safe idempotent retry: reading never advances cursor. Handles A-to-B-to-A reversions; first baseline is NOT a change. No built-in email or ChatGPT alert; paid users may configure an optional signed HTTPS webhook via the documented API. Trial watches do not transfer automatically to separately issued paid keys.
Inputs: since, api_key.
CHANGE EVIDENCE: With a trial or paid key, compare the last two distinct snapshots UKSI actually recorded for an eligible GOV.UK page. Get added/removed text blocks to support a sourced change explanation. If there is only a baseline or no difference, clearly say no demonstrated change.
Inputs: url (required), api_key.
CHANGE EVIDENCE: With a trial or paid key, retrieve recorded timestamps and fingerprints for a fixed-monitored page or your own watched GOV.UK page. History starts when monitoring starts; do not invent older revisions.
Inputs: url (required), api_key.
FREE, NO KEY, NO SIGNUP: Run a real live demonstration against the official GOV.UK VAT rates source. Returns its official URL, government content identifier, source timestamp, fetched text excerpt, a SHA-256 digest and a quote-presence check. Uses one fixed public example; it does NOT claim historical changes or replace UKSI monitored snapshots. For historical change tasks prefer get_govuk_change_brief; this tool only checks current VAT text.
Inputs: quote.
TRIAL/PAID KEY: Stop monitoring a page under your key; removing it does not necessarily remove previously stored snapshots.
Inputs: url (required), api_key.
FREE, NO KEY: Check UK Source Intelligence availability, free-trial readiness and API version. For historical change questions use get_govuk_change_brief; for a live source quote use preview_source_evidence.
Inputs: no named parameters.
WITH HUMAN PERMISSION, NO PAYMENT: Obtain one instant 14-day UK Source Intelligence API trial (10 requests per UTC day, one custom monitored GOV.UK page). Choose this after the free source preview when the human needs their own page checked or tracked. Trial is one per client network address and capacity-limited. Key is issued once: save privately, never log or publish it. Do NOT register speculative trials on behalf of anonymous crawlers.
Inputs: no named parameters.
MONITOR CHANGES: Register a supported canonical GOV.UK page for recurring checks and stored snapshots. Fourteen-day free trial allows 1 custom page; £4.99 one-off 30-day pilot allows 3. Initial baseline is attempted immediately; if unavailable it is queued. First snapshot is not a change event. For a one-call private digest use my_watch_changes and save next_cursor. No guaranteed check interval or built-in email or ChatGPT alert; paid keys may configure an optional signed HTTPS webhook through the API.
Inputs: url (required), api_key.
Recent tool additions, removals, and schema changes observed during successful MCP inspections.
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VAREXIS-INDEX — Source-Linked Evidence & Verification Tools for AI Agents VAREXIS-INDEX provides free, source-linked evidence for agent decisions through twelve focused guides and three distinct read-only MCP connectors. The original `/mcp` connector covers the approved search and preview population. The companion `/mcp/catalogue` provides deterministic access to 724 additional records by category and exact identifier. Configure both through the existing quickstart: https://varexis.tech/index-connect#quickstart Four optional one-time local checkers analyse supported customer-supplied declarations: Tool Admission £49, Audit Coverage £79, Data Exit £79 and Transaction Integrity £149, excluding VAT. These products do not independently inspect live systems, enforce permissions, establish payment settlement, verify deletion or certify compliance. Twelve free decision guides: https://varexis.tech/index-packs#free-decision-guides Read-only agent enquiry navigation (12 guides, 129 referenced records): https://varexis.tech/varexis-index/agent-entry.json Select a candidate guide, then follow the exact connector tool and identifier in the canonical manifest. Navigation does not establish applicability, a customer outcome or authority to act. Evaluate agent permissions, delegated authority, audit provenance, payment integrity, data retention and software supply-chain evidence before relying on documented claims. **FREE MCP CONNECTOR** Endpoint: https://varexis.tech/mcp Connect using Streamable HTTP. No authentication is required for public evidence discovery. Four free, read-only tools: - find_evidence_questions — Find existing reviewed evidence questions and matching routes. - preview_evidence_answer — Retrieve complete supported public answers, sources, limitations and snapshot hashes. - find_package_advisories — Find source-bound software advisory records. - get_index_access_options — Discover available services, pricing, licensing and purchasing requirements. Public MCP cannot execute actions, inspect private systems or authorise deployment. Developer quickstart: https://varexis.tech/index-connect **LICENSED VERIFICATION TOOLS** Four separately licensed, reusable local executables: **1. Agent Tool Admission & Permission Control — £49** Compare declared tool actions, resources, recipients and permissions across supported GitHub, Playwright, Notion and Slack integrations. Identify authority conflicts, missing verification and permission changes before human review. **2. Agent Audit & Evidence Coverage — £79** Reconcile declared identities, authorisations, actions and outcomes. Identify missing audit events, inconsistent references and unresolved export, retention or recovery evidence. **3. Agent Data Exit & Retention Reconciler — £79** Compare declared data inventories, exports, deletions, retention conditions and residual copies. Identify missing evidence and unresolved data-custody conditions during migrations and offboarding. **4. Agent Transaction Integrity & Replay Analyzer — £149** Reconcile declared spending authority, amended transaction terms, scoped idempotency keys, retries and reported outcomes. Identify conflicting purchase attempts and unresolved payment or entitlement evidence. All four products are separately licensed for reusable internal execution. Prices are one-time, exclude applicable VAT and do not include subscriptions, hosting or future updates. Checkers analyse supplied declarations locally. They do not independently inspect production systems, execute payments, enforce permissions, certify compliance or establish financial settlement. Explore all products, representative findings and free previews: https://varexis.tech/index-packs **FREE EVIDENCE PACKS** Seven complete public evidence packs cover: - GitHub and Playwright permission boundaries. - Notion and Slack access and data handling. - Audit and export evidence coverage. - Next.js advisory source assertions. - SonarQube, Snyk and Semgrep scanner trust. - Telemetry redaction and exception handling. - GitHub release approval and artifact identity. Source reviews include documented versions, provenance, exclusions and reliance boundaries. They are not independent deployment tests or current security certifications. 724 additional reviewed records are publicly available through exact-ID HTTP catalogue links and the separate read-only https://varexis.tech/mcp/catalogue connector. They remain outside the original MCP search and preview population and paid saved retrieval. Enhanced natural-language search for these additions remains on HOLD. Public catalogue: https://varexis.tech/varexis-index.json **SAVED EVIDENCE & SUBSCRIPTIONS** - Single Request: £5 — Save a version-bound published evidence result or obtain the eligible original Agent Tool Evaluation & Integration Kit. - Evidence Receipt: £19 — Add an unsigned delivery receipt to the eligible saved result. - Research: £29/month. - Developer/API: £149/month. Prices exclude applicable VAT. Subscription eligibility, rate limits and exclusions apply. The four separately licensed verification executables are not included in these existing evidence or subscription offers. **AGENT PURCHASING & RECOVERY** VAREXIS supports hosted Stripe checkout and compatible authorised MPP/Stripe Shared Payment Token purchasing through separate payment interfaces. Agent purchases require owner spending authority for the exact VAT-inclusive quote and any necessary provider authentication. Not every agent or wallet is supported. Public MCP remains free and read-only. Payment credentials and private customer data must not be submitted to the public connector. Existing purchases should be retrieved using the original credential. Uncertain payments must be investigated and recovered through supported procedures, not automatically purchased again. Purchase or recover: https://varexis.tech/index-access Agent payment contract: https://varexis.tech/varexis-index/agent-payments.json **WHY VAREXIS?** VAREXIS combines source-linked evidence, explicit limitations, versioned deliverables and structured verification of supplied declarations. Its purpose is to help agents and developers distinguish what available evidence actually establishes from what remains uncertain, unsupported or outside authority. Free evidence discovery. Transparent product scope. Reusable local verification. Bounded reliance. Website: https://varexis.tech Developer integration: https://varexis.tech/index-connect MCP endpoint: https://varexis.tech/mcp Additional optional connector: https://varexis.tech/mcp/guidance/v1. Configure it explicitly for get_decision_guide (exact published guide IDs) and check_tool_admission_fit (bounded, source-bound declaration-review suitability). Tool schemas and setup: https://varexis.tech/varexis-index/guidance-mcp-v1.json and https://varexis.tech/index-connect#bounded-guidance. The original /mcp four-tool connector and /mcp/catalogue two-tool connector remain distinct and unchanged. The additional tools are free and read-only; they do not execute actions, verify live permissions, grant entitlements or purchase anything. Missing or unbound applicability returns evidence-required. The existing Tool Admission price and licence remain unchanged.
Your agent needs the open web — searched by more than one engine, and read as clean markdown rather than raw HTML. **What you can ask for** • "Search this question with two providers and tell me where they disagree." • "Scrape these 40 URLs into markdown, in one batch." • "Crawl this documentation site and give me every page." • "Do deep research on this topic and cite the sources." • "Find the academic papers behind this claim." **How to use it** Point any MCP client at https://mcp.aisa.one/search/mcp and sign in with OAuth — there is no key to create or paste. 30 tools across several independent providers: Tavily and Exa search, answers, contents and agent runs; Firecrawl scrape, batch scrape, crawl, map and search; Perplexity Sonar, Sonar Pro, reasoning and deep research; Oxylabs AI search and LLM jobs; OpenAI and Anthropic web search; and scholarly search. **Why this rather than the source** Several independent indexes behind one account, because one engine's blind spot is not visible from inside it. **It is also a door to the rest** The same login reaches 26 sources and 580+ operations. Find the page here, then ask the same agent who links to it or how much traffic it gets — without adding a second server. **What it costs** Finding and inspecting an operation is free. Running one is billed per call at API prices, with no seat and no monthly minimum, and every call takes max_price_usd so an agent cannot overspend by accident. **Where else it reaches** https://mcp.aisa.one/seo-serp/mcp for the Google results page itself, https://mcp.aisa.one/seo-serp-other-engines/mcp for Bing, Baidu and Naver.
Your agent needs marketplace data — what a product costs on Amazon and Google Shopping, who the sellers are, what reviewers actually complain about. **What you can ask for** • "What is this ASIN's price history, rating and seller list?" • "Who else sells this product, and at what price?" • "Pull the reviews for this product and group the complaints." • "What comes up on Google Shopping for this query in the UK?" • "Compare these products across both marketplaces." **How to use it** Point any MCP client at https://mcp.aisa.one/seo-merchant/mcp and sign in with OAuth — there is no key to create or paste. 22 tools: Amazon products, ASIN detail and sellers; Google Shopping products, product info, sellers and reviews; live and queued forms, with raw HTML where you need it. **It is also a door to the rest** The same login reaches 26 sources and 580+ operations. Price the product here, then ask the same agent what the brand's site traffic or ad spend looks like — without adding a second server. **What it costs** Finding and inspecting an operation is free. Running one is billed per call at API prices, with no seat and no monthly minimum, and every call takes max_price_usd so an agent cannot overspend by accident. **Where else it reaches** https://mcp.aisa.one/seo/mcp for all of it at once — rankings, keywords, backlinks, site health and AI-answer visibility across DataForSEO, Semrush and Ahrefs.
Official UK, US and Australia public datasets as filtered CSV, REST API and MCP for AI agents.
Add one secure layer between your agents and this server.
