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Discovers viral content, trending songs, and influencers across TikTok, Instagram, and YouTube through the TopYappers API.
Do not connect
A critical issue was found. Do not connect this server as-is.
Scanned 1 month ago Due for re-check
A server can change after it's graded. Re-run the automated scan to refresh this report.
This grade is deterministic and reproducible: the same server surface always yields the same grade under a given algorithm version. It is a real automated assessment computed by the MCPGrade engine from what the probe actually observed — not a fabricated or opinion score. It is not a manual human pentest, so it can miss context-specific risks.
Every signal below was measured directly by the automated probe. The grade is derived only from evidence like this — nothing is assumed.
The topyappers MCP server exposes 14 tools, focused primarily on general-purpose capabilities. Its published description reads: "Discovers viral content, trending songs, and influencers across TikTok, Instagram, and YouTube through the TopYappers API". It communicates over Streamable HTTP using the 2026-07-28 protocol revision, and does not require authorization to connect. MCPGrade currently rates topyappers F — a critical issue was found and the server should not be connected as-is. Its most notable findings include "Hidden instructions in a tool description" and "Data-exfiltration parameters". This report is a deterministic, reproducible automated assessment: the same observed surface always yields the same grade under a given algorithm version, and it is refreshed as new scans arrive and free to read — but it is not a substitute for a manual human security review. Always re-check topyappers's advertised tools, transport security, and authorization posture before connecting an autonomous agent or sharing sensitive context with it.
Add topyappers to an MCP client using the endpoint below. Review the grade and findings above before granting an autonomous agent access.
MCP endpoint
https://mcp.topyappers.comStreamable HTTP transport. This is the MCP endpoint, not a website — paste it into your MCP client server list rather than a browser.
Captured passively during the read-only scan. Click any value to find servers that match it.
The tools this server advertises via tools/list — names, purposes, and the parameters each accepts, exactly as enumerated read-only.
Discover viral TikTok content. Filter by content category, country, view count, virality score (views÷followers ratio, 0–1), date range, music/sound title, and opening hook text. Returns video URLs, e
Sorted worst-first. Each finding shows its severity, what it means, its OWASP MCP Top-10 mapping, and a recommended fix — the check id links to the exact methodology row that produced it.
tool: search_creators
A tool description contains imperative text aimed at the model (e.g. "ignore previous", "before answering read …").
l', 'new moms'. IMPORTANT: nichesToPromote uses AND logic — always searchRecommendationRemove model-directed instructions from tool descriptions.
tool: search_creators
A tool exposes a free-text/webhook/feedback parameter with no honest purpose — a classic exfil channel.
& Agriculture","History","Home","Humor","Law","Government","Lifestyle",RecommendationRemove side-channel parameters; constrain tool inputs.
tool: search_creators
A tool description tries to alter the model’s use of another tool.
ss those IDs to get_creator_profiles to fetch full profiles. Start with 'nichesToProRecommendationDescriptions must describe only their own tool.
tool: get_creator_profiles
A tool description tries to alter the model’s use of another tool.
(obtained from search_creators). Returns detailed profiles including followerRecommendationDescriptions must describe only their own tool.
tool: get_song_rankings
A tool description tries to alter the model’s use of another tool.
RecommendationDescriptions must describe only their own tool.
tool: get_song_history
A tool description tries to alter the model’s use of another tool.
obtainable from get_song_rankings or search_songs results) and a country_code. CoRecommendationDescriptions must describe only their own tool.
tool: get_song_countries
The text tells the model WHEN to call this tool relative to others ("always call first", "before any other tool", "chain to X tool") — a toxic-flow injection that hijacks the agent’s orchestration rather than describing the tool.
d country codes before calling other song tools. Costs 10 credits per request. {"type":"object"RecommendationTool metadata must describe only the tool, never sequence the agent’s calls.
tool: (server instructions)
A tool exposes a free-text/webhook/feedback parameter with no honest purpose — a classic exfil channel.
jects and email history** so you can reason about creator replies withRecommendationRemove side-channel parameters; constrain tool inputs.
tool: (server instructions)
A tool description tries to alter the model’s use of another tool.
l Content Use `search_viral_content` to discover viral TikTok posts. **Key filtersRecommendationDescriptions must describe only their own tool.
The server accepts tool enumeration (and likely invocation) with no authentication.
RecommendationRequire OAuth 2.1 authorization for any server exposing non-public tools.
tool: search_viral_content
The server advertises open-world / broadly-scoped capabilities.
annotations.openWorldHint = trueRecommendationScope tools to the minimum needed.
tool: search_creators
The server advertises open-world / broadly-scoped capabilities.
annotations.openWorldHint = trueRecommendationScope tools to the minimum needed.
tool: get_creator_profiles
The server advertises open-world / broadly-scoped capabilities.
annotations.openWorldHint = trueRecommendationScope tools to the minimum needed.
tool: search_videos
The server advertises open-world / broadly-scoped capabilities.
annotations.openWorldHint = trueRecommendationScope tools to the minimum needed.
tool: get_song_rankings
The server advertises open-world / broadly-scoped capabilities.
annotations.openWorldHint = trueRecommendationScope tools to the minimum needed.
tool: get_new_song_entries
The server advertises open-world / broadly-scoped capabilities.
annotations.openWorldHint = trueRecommendationScope tools to the minimum needed.
tool: search_songs
The server advertises open-world / broadly-scoped capabilities.
annotations.openWorldHint = trueRecommendationScope tools to the minimum needed.
tool: get_song_history
The server advertises open-world / broadly-scoped capabilities.
annotations.openWorldHint = trueRecommendationScope tools to the minimum needed.
tool: compare_song_rankings
The server advertises open-world / broadly-scoped capabilities.
annotations.openWorldHint = trueRecommendationScope tools to the minimum needed.
tool: get_song_countries
The server advertises open-world / broadly-scoped capabilities.
annotations.openWorldHint = trueRecommendationScope tools to the minimum needed.
tool: get_song_weeks
The server advertises open-world / broadly-scoped capabilities.
annotations.openWorldHint = trueRecommendationScope tools to the minimum needed.
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Agentic rails for complex workflows with receipts, fees, and MCP tool access.
Structural TC39 spec lookup for ECMA-262 and ECMA-402 in AI agents, SHA-pinned and offline-first.
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Search for influencers and creators across TikTok, Instagram, YouTube, Twitch, LinkedIn, and X/Twitter. This endpoint is FREE — it returns creator IDs. Pass those IDs to get_creator_profiles to fetch
Fetch full creator/influencer profiles by their IDs (obtained from search_creators). Returns detailed profiles including follower count, average views, engagement rate, categories, bio, promoted produ
List the user's TopYappers outreach agent projects/campaigns. Use this to map project IDs from message history to campaign details, targeting, deal terms, and custom instructions. Free — does not cons
List creators who have been contacted by the user's outreach agent via email. Filter by exact creator email from an inbox, creator ID, or project ID. Returns creator identity, project IDs, Gmail threa
List saved outreach agent email messages. Use creatorEmail/email from an inbox to retrieve the full conversation history before drafting a customized reply. Can return outbound sent emails and inbound
Search for video content from TikTok, Instagram, YouTube, and Twitch. Filter by creator handle, follower count, views, likes, comments, shares, hashtags, and text search in descriptions/captions. Sort
Get trending song chart rankings for a specific country or globally. Pass a country code (e.g. 'US', 'GB', 'FR') for country-specific charts, or set global=true for worldwide rankings. Optionally spec
Get songs that newly entered the chart for a specific country. Shows fresh trending songs that just appeared on the rankings. Costs 10 credits per request.
Search for songs by title or artist name. Returns matching songs with chart performance data. Costs 10 credits per request.
Get the full chart performance history of a specific song over time. Shows rank progression week by week. Requires song_id (obtainable from get_song_rankings or search_songs results) and a country_cod
Compare song chart rankings between two different weeks for a country. Shows position changes, new entries, and drops between the two weeks. Costs 10 credits per request.
Get the list of available countries (with their codes) for the Songs API. Use this to discover valid country codes before calling other song tools. Costs 10 credits per request.
Get available weeks for a specific country in the Songs API. Use this to discover valid week values before querying rankings or comparisons. Costs 10 credits per request.