Two-Source Rule: a news feed that holds single-source headlines before your trading agent acts

The space is early. Nobody clearly owns the idea of a corroboration layer for LLM trading bots. I found one direct indie competitor (Crypto Intel API, which already sells a two-or-more-source rule) and one open-source building block (crypto-news-store, which counts sources per event). Institutional novelty analytics like RavenPack cover part of the need at prices indie traders won't pay. The Two-Source feed can still stand out if it gets source independence right. That means treating syndicated copies, repeat posts and quote-tweets as one origin, not several. The Corroboration Illusion paper shows that naive counting can be gamed. The feed would also need a transparent source-reputation score, accurate first-seen timestamps across X, RSS and newswires, and a hold flag that a bot can wire in with one line. Crypto-native sources such as exchange announcements, on-chain events and official X accounts are an underserved angle, since equity vendors don't handle them well. The Injection Replay idea is more contested. TradeTrap is already open source and does fake-news fabrication and prompt injection against trading agents, and AutoRedTrader covers adaptive misinformation attacks. Both are research tools focused on equities, so a developer-friendly harness for crypto bots that plugs into common agent frameworks could still win. It will probably work best as a free funnel for the paid feed rather than as a business of its own. The main risks are that existing news APIs such as Benzinga, CryptoPanic or AlphAI add a source-count field, and that latency-sensitive traders won't accept a hold delay.

• Crypto Intel API (dev.to launch post)

  This is the closest direct match to the Two-Source feed. It is a free API that its author says only reports hacks, depegs and similar events once two or more independent sources confirm them, and it returns a confidence score and the source list. It also tracks Fed, SEC, Treasury, CFTC and Trump feeds. It is a self-promoted indie project and I could not check its track record.

• crypto-news-store (agent skill)

  A community agent skill, first listed in June 2026, that merges coverage of one event from several outlets into a single event with a source_count. It keeps state across runs in SQLite. It is a building block, not a hosted product with reputation scores or hold flags.

• TradeTrap

  An academic stress-testing framework for LLM trading agents (arXiv 2512.02261), with code on GitHub. Its attacks include fake-news data fabrication, prompt injection and state tampering, run as closed-loop backtests on NASDAQ-100 equities. It overlaps heavily with the Injection Replay idea but targets researchers and equities, not crypto bot developers.

• AutoRedTrader

  A May 2026 paper on autonomous red-teaming of trading agents. It generates synthetic financial misinformation and uses the agent's responses to make the attacks stronger over time. This is the same idea as Injection Replay. I did not confirm whether the code is public.

• CLEANROOM

  A hackathon trading agent on Alpaca paper trading that is built to resist injection. It reports an injection test suite where 5 of 15 attacks landed with isolation off and none with it on. It shows developers care about the problem, but it is a demo, not a product.

• The Corroboration Illusion (paper)

  A September 2026 paper on how injected articles in a news corpus distort LLM forecasts. It warns that simply counting more sources can make outputs less accurate, which matters directly for a two-source rule: repeats and syndicated copies must not count as independent confirmations.

• RavenPack News Analytics

  An incumbent institutional vendor. Its novelty scores tell users whether an event is new, a repeat or a continuation of an earlier story, across about 19,000 sources. This covers part of the corroboration need for large funds, but it is priced and packaged for institutions, not indie bots.

• Sharpe.ai News

  A crypto news aggregator that detects similar headlines and keeps the highest-quality version. I found no sign that it exposes a corroboration count or a hold flag to bots.

• AlphAI

  A news feed for AI agents and trading bots, built from GDELT, SEC EDGAR and publisher RSS. Each story gets a per-ticker impact estimate and a relevance score, but there is no corroboration or single-source hold. It is the kind of feed this product would sit in front of, or a company that could add this feature.

• Benzinga Crypto News API

  A low-latency crypto news feed over REST, websocket and RSS. Its published fields include created and updated timestamps, but I found no documented deduplication or source-count feature.

Checked 2026-10-20