Awesome Hermes Plugins › Tools & Automation

NousResearch/hermes-plugin-backsearch

⭐ 43 Python added to this list on 2026-08-31 repository created 2026-08-29

hermes-plugin-backsearch is the official Nous Research plugin that gives Hermes Agent point-in-time web search and page retrieval through BackSearch, a frozen news archive operated by General Reasoning. It registers two model tools. `backsearch` runs a hybrid search over the archive as of a given date and accepts a query, an `as_of` cutoff, an optional result count and optional allowed or blocked domain lists. `backfetch` returns the extracted text of a page from the latest capture taken on or before the cutoff, and accepts an optional prompt so a long article comes back as a focused summary instead of full text. Both tools are gated on the `OPENREWARD_API_KEY` environment variable: with no key configured they never enter the model's tool schema, so the tool footprint is zero for users who do not need them. The cutoff is enforced on the crawl date rather than a page's self-reported publish date, which is what prevents documents archived after the cutoff from leaking into a run even when they claim an earlier date. The same query with the same cutoff returns the same results indefinitely, which is the property the plugin exists for: forecasting backtests, quantitative research loops, reinforcement learning environments and reproducible benchmarks where evidence after a cutoff must not reach the model. The preview archive covers news domains between December 2025 and July 2026, and a cutoff outside that window returns an empty hit list rather than an error. Billing runs against an OpenReward prepaid balance per successful request; a fetch with no capture on or before the cutoff returns a soft 404 and is not charged, and an exhausted balance returns an actionable 402. Fetched text is capped at 15K characters. Installation is a clone into the Hermes plugins directory followed by `hermes plugins enable backsearch`. The repository was extracted from a hermes-agent pull request under the project policy that third-party service integrations ship as plugins rather than core code. Tests run offline without a key. MIT licensed.

https://github.com/NousResearch/hermes-plugin-backsearch

web-searchfetchpoint-in-timearchivereproducibilitybacktestingtoolsnousresearch