{"document_id":"BLC-STUDY-0630","slug":"api3-airnode","title":"API3: first-party oracles and Airnode","authors":"API3","year":2020,"date_label":"2020","publisher":"API3","paper_type":"Design paper","category":"Data and agents","topics":["Data and agents"],"source_url":"https://docs.api3.org/","source_label":"API3 documentation","legacy_pdf_path":null,"sha256":null,"sha256_note":"No hash is published. This build does not store those PDF bytes, so a checksum would be invented. Where a legacy path exists, it points at the Internet Archive copy of the old library.","version":"Source cited by the 2020 study. The study is the reading. This page does not add a second essay.","doi":null,"rights_status":"Official external source only","source_status":"Official source","use_status":"Metadata and commentary only. The reading is the study page.","licence":null,"licence_label":"No licence recorded. Rights status under review.","full_text":null,"full_text_reason":"Full text is not published on this page. Public availability is not a licence to republish a document. Blockchain Lab has not recorded a licence that permits an HTML transcription, a training set, or a retrieval corpus of the paper. Text on this page is Blockchain Lab's own wording, or a pointer to a study that is also Blockchain Lab's wording.","repository":null,"editorial_line":"API3's design asks the API provider to run the oracle, so the signer is the party who already operates the API, rather than a third-party node repeating it.","canonical_url":"https://blockchainlab.com/whitepaper/api3-airnode","record_url":"https://blockchainlab.com/research/corpus/papers/api3-airnode","study_url":"https://blockchainlab.com/whitepaper/api3-airnode","last_reviewed":"2026-10-01","last_checked":"2026-10-01","relationships":[{"rel":"Canonical reading","label":"API3 study","href":"/whitepaper/api3-airnode"},{"rel":"Related paper","label":"Chainlink","href":"/whitepaper/chainlink"},{"rel":"Related paper","label":"Town Crier","href":"/whitepaper/town-crier"},{"rel":"Related paper","label":"DECO","href":"/whitepaper/deco-tls"}]}