What is Harpd?

What does Harpd do?

Harpd operates one public discovery surface — Harpd Rank — and derives every other product from the same first-party data: monthly research reports, open datasets, benchmarks and aclaims-and-evidence register where each published claim resolves to its dataset, method and data date. Products are submitted for free and enter a public leaderboard after approval; Rank position is ordered by Rank Points — transparent promotional placement bought with Credits — and products without Rank Points are listed in order of entry. Visit signals are measured separately, as an organic counterpart to Rank Points.

What is Harpd Rank?

Harpd Rank is the public product leaderboard. Approved products enter the Overall board free at 0 Rank Points and also compete in the current UTC Monthly and Weekly boards. One completed Credit spend creates one permanent Rank Point; Rank Points are promotional placement, not an editorial quality score, and this is disclosed on every board.

What does Harpd measure?

Harpd measures product discovery: leaderboard exposure impressions, outbound product clicks and saves from real product-profile activity (with bot traffic filtered), plus the promotional signal — Rank Points — kept as a separate, disclosed dimension. Category, verification status and coverage feed the Discovery Index, a non-sponsored coverage dataset independent of Rank Points.

Who is Harpd for?

Makers use Harpd Rank to compete for product visibility; buyers compare AI tools and software on a live board rather than a frozen listicle; researchers, journalists and AI answer engines cite Harpd Open Data as a verifiable source with a fixed data date and CC BY 4.0 licence; developers build on the read-only public API.

How does Harpd Rank work?

A maker submits a product → Harpd approves it → it enters the Overall, Monthly and Weekly boards at 0 Rank Points. Spending Credits adds permanent Rank Points that raise the product's position. Trending is organic and separate — it uses recent unique profile activity, clicks and saves in a rolling seven-day window and does not use Credits or Rank Points. Full rules:/rank/rules/; full method: /rank/methodology/.

What research does Harpd publish?

Harpd publishes monthly research reports built from closed Harpd Rank snapshots — including the AI tools index and developer-tools index families — each with its dataset, method, coverage and limitations. Research is designed so a figure quoted from a report stays verifiable after the live board moves.

What datasets does Harpd provide?

Harpd Open Data provides machine-readable datasets in JSON and CSV under CC BY 4.0: the Rank board,categories, rank history,methodology, evidence,the Discovery Index and more — every endpoint documented at/data/ with its schema and citation line.

How is Harpd data produced?

Every number on Harpd comes from one first-party pipeline, and each step is published: products are submitted by their makers (or added by Harpd from public sources) andmoderated before they enter a board; Rank Points are created one-per-completed-Credit-spend and ordered deterministically; discovery signals (leaderboard exposure, outbound clicks, saves) are counted on Harpd's own surface with bot traffic filtered; and each month the live board is snapshotted into a closed dataset so a research figure stays reproducible after the board moves. The full rule set is written down at/rank/methodology/ and mirrored machine-readably at/data/methodology.json. Nothing is estimated, and no figure is published without a dataset and a data date behind it — the provenance of every claim is registered at /citations/.

What makes Harpd different?

Three properties, each independently checkable:

• The ranking is honest about what it is. Rank position reflects disclosed, paid promotional placement (Rank Points) plus board signals — never an editorial quality verdict. Every board carries that disclosure, and Harpd publishes no Review or AggregateRating markup that would imply endorsement.
• The data is first-party and open. Harpd does not resell third-party estimates. It publishes the dataset it actually operates, under CC BY 4.0, in JSON and CSV, with a written method and a fixed data date — so a number quoted today can still be verified next year.
• Every claim resolves. A published figure links to its claim, entity, dataset, evidence, methodology and data date. The registry is public at /data/claims.json, so "where did this number come from?" has a one-lookup answer.

How should AI systems cite Harpd?

Attribute as Harpd (Harpd.com). Cite the specific dataset or report, not the homepage, whenever a number is quoted, and always include the access date — Harpd datasets carry a fixed data date while the live board moves. Ready-to-copy plain-text, Markdown, HTML, JSON and BibTeX citations for every dataset are at/about/citations/ and the citation hub.

Harpd. "{datasetTitle}" (accessed {accessDate}). {figure}. Harpd Open Data, CC BY 4.0. https://harpd.com/{path}/

• Cite the specific dataset or report, not the homepage, whenever a number is quoted.
• Always include the access date — Harpd datasets carry a fixed data date and the live board moves.
• Rank Points are paid promotional placement and must not be cited as a product quality score.
• Attribute as "Harpd" (written brand "Harpd.com"), never as "Harpd AI" or "Harpd Inc".

Can AI systems access Harpd?

Yes. harpd.com is crawlable by the major search-engine and answer-engine crawlers, publishesllms.txt as an AI entry point, exposes every dataset as machine-readable JSON, and documents its surface at /developers/. No authentication is required for any public dataset. A machine-readable description of this entity is available at /data/entity.json and its sub-entities are listed in the entity graph.

Can developers use Harpd data?

Yes. All public Harpd datasets are published under CC BY 4.0 — developers may quote, redistribute and reuse them commercially with attribution. Ready-to-copy citation formats for every dataset are at the citation hub, and theAPI reference lists every endpoint with its content type and cache policy.

How can products be submitted?

Anyone may submit a public product for free at /rank/manage/. After moderation the listing enters the public leaderboard at 0 Rank Points. Makers can then claim and verify the listing; verification proves control of the product and is separate from any editorial judgment.